net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  41         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  42         .hdrsize = 0,                   /* no private header */
  43         .version = 1,                   /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* returns ERR_PTR values */
  51 static struct wireless_dev *
  52 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  53 {
  54         struct cfg80211_registered_device *rdev;
  55         struct wireless_dev *result = NULL;
  56         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  57         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  58         u64 wdev_id;
  59         int wiphy_idx = -1;
  60         int ifidx = -1;
  61
  62         ASSERT_RTNL();
  63
  64         if (!have_ifidx && !have_wdev_id)
  65                 return ERR_PTR(-EINVAL);
  66
  67         if (have_ifidx)
  68                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  69         if (have_wdev_id) {
  70                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  71                 wiphy_idx = wdev_id >> 32;
  72         }
  73
  74         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  75                 struct wireless_dev *wdev;
  76
  77                 if (wiphy_net(&rdev->wiphy) != netns)
  78                         continue;
  79
  80                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  81                         continue;
  82
  83                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  84                         if (have_ifidx && wdev->netdev &&
  85                             wdev->netdev->ifindex == ifidx) {
  86                                 result = wdev;
  87                                 break;
  88                         }
  89                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  90                                 result = wdev;
  91                                 break;
  92                         }
  93                 }
  94
  95                 if (result)
  96                         break;
  97         }
  98
  99         if (result)
 100                 return result;
 101         return ERR_PTR(-ENODEV);
 102 }
 103
 104 static struct cfg80211_registered_device *
 105 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 106 {
 107         struct cfg80211_registered_device *rdev = NULL, *tmp;
 108         struct net_device *netdev;
 109
 110         ASSERT_RTNL();
 111
 112         if (!attrs[NL80211_ATTR_WIPHY] &&
 113             !attrs[NL80211_ATTR_IFINDEX] &&
 114             !attrs[NL80211_ATTR_WDEV])
 115                 return ERR_PTR(-EINVAL);
 116
 117         if (attrs[NL80211_ATTR_WIPHY])
 118                 rdev = cfg80211_rdev_by_wiphy_idx(
 119                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 120
 121         if (attrs[NL80211_ATTR_WDEV]) {
 122                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 123                 struct wireless_dev *wdev;
 124                 bool found = false;
 125
 126                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 127                 if (tmp) {
 128                         /* make sure wdev exists */
 129                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 130                                 if (wdev->identifier != (u32)wdev_id)
 131                                         continue;
 132                                 found = true;
 133                                 break;
 134                         }
 135
 136                         if (!found)
 137                                 tmp = NULL;
 138
 139                         if (rdev && tmp != rdev)
 140                                 return ERR_PTR(-EINVAL);
 141                         rdev = tmp;
 142                 }
 143         }
 144
 145         if (attrs[NL80211_ATTR_IFINDEX]) {
 146                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 147                 netdev = dev_get_by_index(netns, ifindex);
 148                 if (netdev) {
 149                         if (netdev->ieee80211_ptr)
 150                                 tmp = wiphy_to_dev(
 151                                                 netdev->ieee80211_ptr->wiphy);
 152                         else
 153                                 tmp = NULL;
 154
 155                         dev_put(netdev);
 156
 157                         /* not wireless device -- return error */
 158                         if (!tmp)
 159                                 return ERR_PTR(-EINVAL);
 160
 161                         /* mismatch -- return error */
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         rdev = tmp;
 166                 }
 167         }
 168
 169         if (!rdev)
 170                 return ERR_PTR(-ENODEV);
 171
 172         if (netns != wiphy_net(&rdev->wiphy))
 173                 return ERR_PTR(-ENODEV);
 174
 175         return rdev;
 176 }
 177
 178 /*
 179  * This function returns a pointer to the driver
 180  * that the genl_info item that is passed refers to.
 181  *
 182  * The result of this can be a PTR_ERR and hence must
 183  * be checked with IS_ERR() for errors.
 184  */
 185 static struct cfg80211_registered_device *
 186 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 187 {
 188         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 189 }
 190
 191 /* policy for the attributes */
 192 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 193         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 194         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 195                                       .len = 20-1 },
 196         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 197
 198         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 199         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 200         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 201         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 202         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 203
 204         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 205         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 206         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 207         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 208         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 209
 210         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 211         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 212         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 213
 214         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 215         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 216
 217         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 218         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 219                                     .len = WLAN_MAX_KEY_LEN },
 220         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 221         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 222         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 223         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 224         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 225
 226         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 227         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 229                                        .len = IEEE80211_MAX_DATA_LEN },
 230         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 231                                        .len = IEEE80211_MAX_DATA_LEN },
 232         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 233         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 234         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 235         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 236                                                .len = NL80211_MAX_SUPP_RATES },
 237         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 238         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 239         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 240         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 241                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 242         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 243
 244         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 245         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 246
 247         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 248         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 249         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 250         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 251                                            .len = NL80211_MAX_SUPP_RATES },
 252         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 253
 254         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 255         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 256
 257         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 258
 259         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 261                               .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 264
 265         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 266                                 .len = IEEE80211_MAX_SSID_LEN },
 267         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 268         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 269         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 270         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 271         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 272         [NL80211_ATTR_STA_FLAGS2] = {
 273                 .len = sizeof(struct nl80211_sta_flag_update),
 274         },
 275         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 276         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 277         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 278         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 279         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 280         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 281         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 282         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 283         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 284                                  .len = WLAN_PMKID_LEN },
 285         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 286         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 287         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 288         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 289                                  .len = IEEE80211_MAX_DATA_LEN },
 290         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 291         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 292         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 293         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 294         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 295         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 296         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 297         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 299         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 300         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 301         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 302         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 303         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 304         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 305         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 306         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 307         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 308         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 309         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 310                                          .len = IEEE80211_MAX_DATA_LEN },
 311         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 312                                          .len = IEEE80211_MAX_DATA_LEN },
 313         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 314         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 315         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 316         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 317         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 318         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 319         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 320         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 321         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 322         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 323                                       .len = IEEE80211_MAX_DATA_LEN },
 324         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 325         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 326         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 327                 .len = NL80211_HT_CAPABILITY_LEN
 328         },
 329         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 330         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 331         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 332         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 333         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 334         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 335         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 336         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 337         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 338         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 339         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 340         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 341         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 342         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 343         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 344         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 346                 .len = NL80211_VHT_CAPABILITY_LEN,
 347         },
 348         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 349         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 350                                   .len = IEEE80211_MAX_DATA_LEN },
 351         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 352         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 353         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 354         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 355         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_U16 },
 356         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_U16 },
 357 };
 358
 359 /* policy for the key attributes */
 360 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 361         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 362         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 363         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 364         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 365         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 366         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 367         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 368         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 369 };
 370
 371 /* policy for the key default flags */
 372 static const struct nla_policy
 373 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 374         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 375         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 376 };
 377
 378 /* policy for WoWLAN attributes */
 379 static const struct nla_policy
 380 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 381         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 382         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 383         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 384         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 385         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 386         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 387         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 388         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 389         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 390 };
 391
 392 static const struct nla_policy
 393 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 394         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 395         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 396         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 397         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 398         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 399         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 400         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 401                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 402         },
 403         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 404                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 405         },
 406         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 407         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 408         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 409 };
 410
 411 /* policy for coalesce rule attributes */
 412 static const struct nla_policy
 413 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 414         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 415         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 416         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 417 };
 418
 419 /* policy for GTK rekey offload attributes */
 420 static const struct nla_policy
 421 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 422         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 423         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 424         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 425 };
 426
 427 static const struct nla_policy
 428 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 429         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 430                                                  .len = IEEE80211_MAX_SSID_LEN },
 431         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 432 };
 433
 434 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 435                                      struct netlink_callback *cb,
 436                                      struct cfg80211_registered_device **rdev,
 437                                      struct wireless_dev **wdev)
 438 {
 439         int err;
 440
 441         rtnl_lock();
 442
 443         if (!cb->args[0]) {
 444                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 445                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 446                                   nl80211_policy);
 447                 if (err)
 448                         goto out_unlock;
 449
 450                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 451                                                    nl80211_fam.attrbuf);
 452                 if (IS_ERR(*wdev)) {
 453                         err = PTR_ERR(*wdev);
 454                         goto out_unlock;
 455                 }
 456                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 457                 /* 0 is the first index - add 1 to parse only once */
 458                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 459                 cb->args[1] = (*wdev)->identifier;
 460         } else {
 461                 /* subtract the 1 again here */
 462                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 463                 struct wireless_dev *tmp;
 464
 465                 if (!wiphy) {
 466                         err = -ENODEV;
 467                         goto out_unlock;
 468                 }
 469                 *rdev = wiphy_to_dev(wiphy);
 470                 *wdev = NULL;
 471
 472                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 473                         if (tmp->identifier == cb->args[1]) {
 474                                 *wdev = tmp;
 475                                 break;
 476                         }
 477                 }
 478
 479                 if (!*wdev) {
 480                         err = -ENODEV;
 481                         goto out_unlock;
 482                 }
 483         }
 484
 485         return 0;
 486  out_unlock:
 487         rtnl_unlock();
 488         return err;
 489 }
 490
 491 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 492 {
 493         rtnl_unlock();
 494 }
 495
 496 /* IE validation */
 497 static bool is_valid_ie_attr(const struct nlattr *attr)
 498 {
 499         const u8 *pos;
 500         int len;
 501
 502         if (!attr)
 503                 return true;
 504
 505         pos = nla_data(attr);
 506         len = nla_len(attr);
 507
 508         while (len) {
 509                 u8 elemlen;
 510
 511                 if (len < 2)
 512                         return false;
 513                 len -= 2;
 514
 515                 elemlen = pos[1];
 516                 if (elemlen > len)
 517                         return false;
 518
 519                 len -= elemlen;
 520                 pos += 2 + elemlen;
 521         }
 522
 523         return true;
 524 }
 525
 526 /* message building helper */
 527 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 528                                    int flags, u8 cmd)
 529 {
 530         /* since there is no private header just add the generic one */
 531         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 532 }
 533
 534 static int nl80211_msg_put_channel(struct sk_buff *msg,
 535                                    struct ieee80211_channel *chan,
 536                                    bool large)
 537 {
 538         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 539                         chan->center_freq))
 540                 goto nla_put_failure;
 541
 542         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 543             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 544                 goto nla_put_failure;
 545         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 546             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 547                 goto nla_put_failure;
 548         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 549             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 550                 goto nla_put_failure;
 551         if (chan->flags & IEEE80211_CHAN_RADAR) {
 552                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 553                         goto nla_put_failure;
 554                 if (large) {
 555                         u32 time;
 556
 557                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 558
 559                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 560                                         chan->dfs_state))
 561                                 goto nla_put_failure;
 562                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 563                                         time))
 564                                 goto nla_put_failure;
 565                 }
 566         }
 567
 568         if (large) {
 569                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 570                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 571                         goto nla_put_failure;
 572                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 573                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 574                         goto nla_put_failure;
 575                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 576                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 577                         goto nla_put_failure;
 578                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 579                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 580                         goto nla_put_failure;
 581         }
 582
 583         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 584                         DBM_TO_MBM(chan->max_power)))
 585                 goto nla_put_failure;
 586
 587         return 0;
 588
 589  nla_put_failure:
 590         return -ENOBUFS;
 591 }
 592
 593 /* netlink command implementations */
 594
 595 struct key_parse {
 596         struct key_params p;
 597         int idx;
 598         int type;
 599         bool def, defmgmt;
 600         bool def_uni, def_multi;
 601 };
 602
 603 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 604 {
 605         struct nlattr *tb[NL80211_KEY_MAX + 1];
 606         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 607                                    nl80211_key_policy);
 608         if (err)
 609                 return err;
 610
 611         k->def = !!tb[NL80211_KEY_DEFAULT];
 612         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 613
 614         if (k->def) {
 615                 k->def_uni = true;
 616                 k->def_multi = true;
 617         }
 618         if (k->defmgmt)
 619                 k->def_multi = true;
 620
 621         if (tb[NL80211_KEY_IDX])
 622                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 623
 624         if (tb[NL80211_KEY_DATA]) {
 625                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 626                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 627         }
 628
 629         if (tb[NL80211_KEY_SEQ]) {
 630                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 631                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 632         }
 633
 634         if (tb[NL80211_KEY_CIPHER])
 635                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 636
 637         if (tb[NL80211_KEY_TYPE]) {
 638                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 639                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 640                         return -EINVAL;
 641         }
 642
 643         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 644                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 645                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 646                                        tb[NL80211_KEY_DEFAULT_TYPES],
 647                                        nl80211_key_default_policy);
 648                 if (err)
 649                         return err;
 650
 651                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 652                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 653         }
 654
 655         return 0;
 656 }
 657
 658 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 659 {
 660         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 661                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 662                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 663         }
 664
 665         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 666                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 667                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 668         }
 669
 670         if (info->attrs[NL80211_ATTR_KEY_IDX])
 671                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 672
 673         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 674                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 675
 676         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 677         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 678
 679         if (k->def) {
 680                 k->def_uni = true;
 681                 k->def_multi = true;
 682         }
 683         if (k->defmgmt)
 684                 k->def_multi = true;
 685
 686         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 687                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 688                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 689                         return -EINVAL;
 690         }
 691
 692         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 693                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 694                 int err = nla_parse_nested(
 695                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 696                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 697                                 nl80211_key_default_policy);
 698                 if (err)
 699                         return err;
 700
 701                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 702                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 703         }
 704
 705         return 0;
 706 }
 707
 708 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 709 {
 710         int err;
 711
 712         memset(k, 0, sizeof(*k));
 713         k->idx = -1;
 714         k->type = -1;
 715
 716         if (info->attrs[NL80211_ATTR_KEY])
 717                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 718         else
 719                 err = nl80211_parse_key_old(info, k);
 720
 721         if (err)
 722                 return err;
 723
 724         if (k->def && k->defmgmt)
 725                 return -EINVAL;
 726
 727         if (k->defmgmt) {
 728                 if (k->def_uni || !k->def_multi)
 729                         return -EINVAL;
 730         }
 731
 732         if (k->idx != -1) {
 733                 if (k->defmgmt) {
 734                         if (k->idx < 4 || k->idx > 5)
 735                                 return -EINVAL;
 736                 } else if (k->def) {
 737                         if (k->idx < 0 || k->idx > 3)
 738                                 return -EINVAL;
 739                 } else {
 740                         if (k->idx < 0 || k->idx > 5)
 741                                 return -EINVAL;
 742                 }
 743         }
 744
 745         return 0;
 746 }
 747
 748 static struct cfg80211_cached_keys *
 749 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 750                        struct nlattr *keys, bool *no_ht)
 751 {
 752         struct key_parse parse;
 753         struct nlattr *key;
 754         struct cfg80211_cached_keys *result;
 755         int rem, err, def = 0;
 756
 757         result = kzalloc(sizeof(*result), GFP_KERNEL);
 758         if (!result)
 759                 return ERR_PTR(-ENOMEM);
 760
 761         result->def = -1;
 762         result->defmgmt = -1;
 763
 764         nla_for_each_nested(key, keys, rem) {
 765                 memset(&parse, 0, sizeof(parse));
 766                 parse.idx = -1;
 767
 768                 err = nl80211_parse_key_new(key, &parse);
 769                 if (err)
 770                         goto error;
 771                 err = -EINVAL;
 772                 if (!parse.p.key)
 773                         goto error;
 774                 if (parse.idx < 0 || parse.idx > 4)
 775                         goto error;
 776                 if (parse.def) {
 777                         if (def)
 778                                 goto error;
 779                         def = 1;
 780                         result->def = parse.idx;
 781                         if (!parse.def_uni || !parse.def_multi)
 782                                 goto error;
 783                 } else if (parse.defmgmt)
 784                         goto error;
 785                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 786                                                      parse.idx, false, NULL);
 787                 if (err)
 788                         goto error;
 789                 result->params[parse.idx].cipher = parse.p.cipher;
 790                 result->params[parse.idx].key_len = parse.p.key_len;
 791                 result->params[parse.idx].key = result->data[parse.idx];
 792                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 793
 794                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 795                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 796                         if (no_ht)
 797                                 *no_ht = true;
 798                 }
 799         }
 800
 801         return result;
 802  error:
 803         kfree(result);
 804         return ERR_PTR(err);
 805 }
 806
 807 static int nl80211_key_allowed(struct wireless_dev *wdev)
 808 {
 809         ASSERT_WDEV_LOCK(wdev);
 810
 811         switch (wdev->iftype) {
 812         case NL80211_IFTYPE_AP:
 813         case NL80211_IFTYPE_AP_VLAN:
 814         case NL80211_IFTYPE_P2P_GO:
 815         case NL80211_IFTYPE_MESH_POINT:
 816                 break;
 817         case NL80211_IFTYPE_ADHOC:
 818         case NL80211_IFTYPE_STATION:
 819         case NL80211_IFTYPE_P2P_CLIENT:
 820                 if (!wdev->current_bss)
 821                         return -ENOLINK;
 822                 break;
 823         default:
 824                 return -EINVAL;
 825         }
 826
 827         return 0;
 828 }
 829
 830 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 831 {
 832         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 833         int i;
 834
 835         if (!nl_modes)
 836                 goto nla_put_failure;
 837
 838         i = 0;
 839         while (ifmodes) {
 840                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 841                         goto nla_put_failure;
 842                 ifmodes >>= 1;
 843                 i++;
 844         }
 845
 846         nla_nest_end(msg, nl_modes);
 847         return 0;
 848
 849 nla_put_failure:
 850         return -ENOBUFS;
 851 }
 852
 853 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 854                                           struct sk_buff *msg,
 855                                           bool large)
 856 {
 857         struct nlattr *nl_combis;
 858         int i, j;
 859
 860         nl_combis = nla_nest_start(msg,
 861                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 862         if (!nl_combis)
 863                 goto nla_put_failure;
 864
 865         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 866                 const struct ieee80211_iface_combination *c;
 867                 struct nlattr *nl_combi, *nl_limits;
 868
 869                 c = &wiphy->iface_combinations[i];
 870
 871                 nl_combi = nla_nest_start(msg, i + 1);
 872                 if (!nl_combi)
 873                         goto nla_put_failure;
 874
 875                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 876                 if (!nl_limits)
 877                         goto nla_put_failure;
 878
 879                 for (j = 0; j < c->n_limits; j++) {
 880                         struct nlattr *nl_limit;
 881
 882                         nl_limit = nla_nest_start(msg, j + 1);
 883                         if (!nl_limit)
 884                                 goto nla_put_failure;
 885                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 886                                         c->limits[j].max))
 887                                 goto nla_put_failure;
 888                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 889                                                 c->limits[j].types))
 890                                 goto nla_put_failure;
 891                         nla_nest_end(msg, nl_limit);
 892                 }
 893
 894                 nla_nest_end(msg, nl_limits);
 895
 896                 if (c->beacon_int_infra_match &&
 897                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 898                         goto nla_put_failure;
 899                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 900                                 c->num_different_channels) ||
 901                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 902                                 c->max_interfaces))
 903                         goto nla_put_failure;
 904                 if (large &&
 905                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 906                                 c->radar_detect_widths))
 907                         goto nla_put_failure;
 908
 909                 nla_nest_end(msg, nl_combi);
 910         }
 911
 912         nla_nest_end(msg, nl_combis);
 913
 914         return 0;
 915 nla_put_failure:
 916         return -ENOBUFS;
 917 }
 918
 919 #ifdef CONFIG_PM
 920 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 921                                         struct sk_buff *msg)
 922 {
 923         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 924         struct nlattr *nl_tcp;
 925
 926         if (!tcp)
 927                 return 0;
 928
 929         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 930         if (!nl_tcp)
 931                 return -ENOBUFS;
 932
 933         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 934                         tcp->data_payload_max))
 935                 return -ENOBUFS;
 936
 937         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 938                         tcp->data_payload_max))
 939                 return -ENOBUFS;
 940
 941         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 942                 return -ENOBUFS;
 943
 944         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 945                                 sizeof(*tcp->tok), tcp->tok))
 946                 return -ENOBUFS;
 947
 948         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 949                         tcp->data_interval_max))
 950                 return -ENOBUFS;
 951
 952         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 953                         tcp->wake_payload_max))
 954                 return -ENOBUFS;
 955
 956         nla_nest_end(msg, nl_tcp);
 957         return 0;
 958 }
 959
 960 static int nl80211_send_wowlan(struct sk_buff *msg,
 961                                struct cfg80211_registered_device *dev,
 962                                bool large)
 963 {
 964         struct nlattr *nl_wowlan;
 965
 966         if (!dev->wiphy.wowlan)
 967                 return 0;
 968
 969         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 970         if (!nl_wowlan)
 971                 return -ENOBUFS;
 972
 973         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
 974              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 975             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
 976              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 977             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 978              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 979             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 980              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 981             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 982              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 983             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 984              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
 985             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
 986              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
 987             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
 988              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
 989                 return -ENOBUFS;
 990
 991         if (dev->wiphy.wowlan->n_patterns) {
 992                 struct nl80211_pattern_support pat = {
 993                         .max_patterns = dev->wiphy.wowlan->n_patterns,
 994                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
 995                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
 996                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
 997                 };
 998
 999                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1000                             sizeof(pat), &pat))
1001                         return -ENOBUFS;
1002         }
1003
1004         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1005                 return -ENOBUFS;
1006
1007         nla_nest_end(msg, nl_wowlan);
1008
1009         return 0;
1010 }
1011 #endif
1012
1013 static int nl80211_send_coalesce(struct sk_buff *msg,
1014                                  struct cfg80211_registered_device *dev)
1015 {
1016         struct nl80211_coalesce_rule_support rule;
1017
1018         if (!dev->wiphy.coalesce)
1019                 return 0;
1020
1021         rule.max_rules = dev->wiphy.coalesce->n_rules;
1022         rule.max_delay = dev->wiphy.coalesce->max_delay;
1023         rule.pat.max_patterns = dev->wiphy.coalesce->n_patterns;
1024         rule.pat.min_pattern_len = dev->wiphy.coalesce->pattern_min_len;
1025         rule.pat.max_pattern_len = dev->wiphy.coalesce->pattern_max_len;
1026         rule.pat.max_pkt_offset = dev->wiphy.coalesce->max_pkt_offset;
1027
1028         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1029                 return -ENOBUFS;
1030
1031         return 0;
1032 }
1033
1034 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1035                                       struct ieee80211_supported_band *sband)
1036 {
1037         struct nlattr *nl_rates, *nl_rate;
1038         struct ieee80211_rate *rate;
1039         int i;
1040
1041         /* add HT info */
1042         if (sband->ht_cap.ht_supported &&
1043             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1044                      sizeof(sband->ht_cap.mcs),
1045                      &sband->ht_cap.mcs) ||
1046              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1047                          sband->ht_cap.cap) ||
1048              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1049                         sband->ht_cap.ampdu_factor) ||
1050              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1051                         sband->ht_cap.ampdu_density)))
1052                 return -ENOBUFS;
1053
1054         /* add VHT info */
1055         if (sband->vht_cap.vht_supported &&
1056             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1057                      sizeof(sband->vht_cap.vht_mcs),
1058                      &sband->vht_cap.vht_mcs) ||
1059              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1060                          sband->vht_cap.cap)))
1061                 return -ENOBUFS;
1062
1063         /* add bitrates */
1064         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1065         if (!nl_rates)
1066                 return -ENOBUFS;
1067
1068         for (i = 0; i < sband->n_bitrates; i++) {
1069                 nl_rate = nla_nest_start(msg, i);
1070                 if (!nl_rate)
1071                         return -ENOBUFS;
1072
1073                 rate = &sband->bitrates[i];
1074                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1075                                 rate->bitrate))
1076                         return -ENOBUFS;
1077                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1078                     nla_put_flag(msg,
1079                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1080                         return -ENOBUFS;
1081
1082                 nla_nest_end(msg, nl_rate);
1083         }
1084
1085         nla_nest_end(msg, nl_rates);
1086
1087         return 0;
1088 }
1089
1090 static int
1091 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1092                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1093 {
1094         u16 stypes;
1095         struct nlattr *nl_ftypes, *nl_ifs;
1096         enum nl80211_iftype ift;
1097         int i;
1098
1099         if (!mgmt_stypes)
1100                 return 0;
1101
1102         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1103         if (!nl_ifs)
1104                 return -ENOBUFS;
1105
1106         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1107                 nl_ftypes = nla_nest_start(msg, ift);
1108                 if (!nl_ftypes)
1109                         return -ENOBUFS;
1110                 i = 0;
1111                 stypes = mgmt_stypes[ift].tx;
1112                 while (stypes) {
1113                         if ((stypes & 1) &&
1114                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1115                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1116                                 return -ENOBUFS;
1117                         stypes >>= 1;
1118                         i++;
1119                 }
1120                 nla_nest_end(msg, nl_ftypes);
1121         }
1122
1123         nla_nest_end(msg, nl_ifs);
1124
1125         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1126         if (!nl_ifs)
1127                 return -ENOBUFS;
1128
1129         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1130                 nl_ftypes = nla_nest_start(msg, ift);
1131                 if (!nl_ftypes)
1132                         return -ENOBUFS;
1133                 i = 0;
1134                 stypes = mgmt_stypes[ift].rx;
1135                 while (stypes) {
1136                         if ((stypes & 1) &&
1137                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1138                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1139                                 return -ENOBUFS;
1140                         stypes >>= 1;
1141                         i++;
1142                 }
1143                 nla_nest_end(msg, nl_ftypes);
1144         }
1145         nla_nest_end(msg, nl_ifs);
1146
1147         return 0;
1148 }
1149
1150 struct nl80211_dump_wiphy_state {
1151         s64 filter_wiphy;
1152         long start;
1153         long split_start, band_start, chan_start;
1154         bool split;
1155 };
1156
1157 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1158                               struct sk_buff *msg, u32 portid, u32 seq,
1159                               int flags, struct nl80211_dump_wiphy_state *state)
1160 {
1161         void *hdr;
1162         struct nlattr *nl_bands, *nl_band;
1163         struct nlattr *nl_freqs, *nl_freq;
1164         struct nlattr *nl_cmds;
1165         enum ieee80211_band band;
1166         struct ieee80211_channel *chan;
1167         int i;
1168         const struct ieee80211_txrx_stypes *mgmt_stypes =
1169                                 dev->wiphy.mgmt_stypes;
1170         u32 features;
1171
1172         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1173         if (!hdr)
1174                 return -ENOBUFS;
1175
1176         if (WARN_ON(!state))
1177                 return -EINVAL;
1178
1179         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1180             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1181                            wiphy_name(&dev->wiphy)) ||
1182             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1183                         cfg80211_rdev_list_generation))
1184                 goto nla_put_failure;
1185
1186         switch (state->split_start) {
1187         case 0:
1188                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1189                                dev->wiphy.retry_short) ||
1190                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1191                                dev->wiphy.retry_long) ||
1192                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1193                                 dev->wiphy.frag_threshold) ||
1194                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1195                                 dev->wiphy.rts_threshold) ||
1196                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1197                                dev->wiphy.coverage_class) ||
1198                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1199                                dev->wiphy.max_scan_ssids) ||
1200                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1201                                dev->wiphy.max_sched_scan_ssids) ||
1202                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1203                                 dev->wiphy.max_scan_ie_len) ||
1204                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1205                                 dev->wiphy.max_sched_scan_ie_len) ||
1206                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1207                                dev->wiphy.max_match_sets))
1208                         goto nla_put_failure;
1209
1210                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1211                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1212                         goto nla_put_failure;
1213                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1214                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1215                         goto nla_put_failure;
1216                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1217                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1218                         goto nla_put_failure;
1219                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1220                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1221                         goto nla_put_failure;
1222                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1223                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1224                         goto nla_put_failure;
1225                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1226                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1227                         goto nla_put_failure;
1228                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1229                     nla_put_flag(msg, WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1230                         goto nla_put_failure;
1231
1232                 state->split_start++;
1233                 if (state->split)
1234                         break;
1235         case 1:
1236                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1237                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1238                             dev->wiphy.cipher_suites))
1239                         goto nla_put_failure;
1240
1241                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1242                                dev->wiphy.max_num_pmkids))
1243                         goto nla_put_failure;
1244
1245                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1246                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1247                         goto nla_put_failure;
1248
1249                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1250                                 dev->wiphy.available_antennas_tx) ||
1251                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1252                                 dev->wiphy.available_antennas_rx))
1253                         goto nla_put_failure;
1254
1255                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1256                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1257                                 dev->wiphy.probe_resp_offload))
1258                         goto nla_put_failure;
1259
1260                 if ((dev->wiphy.available_antennas_tx ||
1261                      dev->wiphy.available_antennas_rx) &&
1262                     dev->ops->get_antenna) {
1263                         u32 tx_ant = 0, rx_ant = 0;
1264                         int res;
1265                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1266                         if (!res) {
1267                                 if (nla_put_u32(msg,
1268                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1269                                                 tx_ant) ||
1270                                     nla_put_u32(msg,
1271                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1272                                                 rx_ant))
1273                                         goto nla_put_failure;
1274                         }
1275                 }
1276
1277                 state->split_start++;
1278                 if (state->split)
1279                         break;
1280         case 2:
1281                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1282                                         dev->wiphy.interface_modes))
1283                                 goto nla_put_failure;
1284                 state->split_start++;
1285                 if (state->split)
1286                         break;
1287         case 3:
1288                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1289                 if (!nl_bands)
1290                         goto nla_put_failure;
1291
1292                 for (band = state->band_start;
1293                      band < IEEE80211_NUM_BANDS; band++) {
1294                         struct ieee80211_supported_band *sband;
1295
1296                         sband = dev->wiphy.bands[band];
1297
1298                         if (!sband)
1299                                 continue;
1300
1301                         nl_band = nla_nest_start(msg, band);
1302                         if (!nl_band)
1303                                 goto nla_put_failure;
1304
1305                         switch (state->chan_start) {
1306                         case 0:
1307                                 if (nl80211_send_band_rateinfo(msg, sband))
1308                                         goto nla_put_failure;
1309                                 state->chan_start++;
1310                                 if (state->split)
1311                                         break;
1312                         default:
1313                                 /* add frequencies */
1314                                 nl_freqs = nla_nest_start(
1315                                         msg, NL80211_BAND_ATTR_FREQS);
1316                                 if (!nl_freqs)
1317                                         goto nla_put_failure;
1318
1319                                 for (i = state->chan_start - 1;
1320                                      i < sband->n_channels;
1321                                      i++) {
1322                                         nl_freq = nla_nest_start(msg, i);
1323                                         if (!nl_freq)
1324                                                 goto nla_put_failure;
1325
1326                                         chan = &sband->channels[i];
1327
1328                                         if (nl80211_msg_put_channel(
1329                                                         msg, chan,
1330                                                         state->split))
1331                                                 goto nla_put_failure;
1332
1333                                         nla_nest_end(msg, nl_freq);
1334                                         if (state->split)
1335                                                 break;
1336                                 }
1337                                 if (i < sband->n_channels)
1338                                         state->chan_start = i + 2;
1339                                 else
1340                                         state->chan_start = 0;
1341                                 nla_nest_end(msg, nl_freqs);
1342                         }
1343
1344                         nla_nest_end(msg, nl_band);
1345
1346                         if (state->split) {
1347                                 /* start again here */
1348                                 if (state->chan_start)
1349                                         band--;
1350                                 break;
1351                         }
1352                 }
1353                 nla_nest_end(msg, nl_bands);
1354
1355                 if (band < IEEE80211_NUM_BANDS)
1356                         state->band_start = band + 1;
1357                 else
1358                         state->band_start = 0;
1359
1360                 /* if bands & channels are done, continue outside */
1361                 if (state->band_start == 0 && state->chan_start == 0)
1362                         state->split_start++;
1363                 if (state->split)
1364                         break;
1365         case 4:
1366                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1367                 if (!nl_cmds)
1368                         goto nla_put_failure;
1369
1370                 i = 0;
1371 #define CMD(op, n)                                                      \
1372                  do {                                                   \
1373                         if (dev->ops->op) {                             \
1374                                 i++;                                    \
1375                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1376                                         goto nla_put_failure;           \
1377                         }                                               \
1378                 } while (0)
1379
1380                 CMD(add_virtual_intf, NEW_INTERFACE);
1381                 CMD(change_virtual_intf, SET_INTERFACE);
1382                 CMD(add_key, NEW_KEY);
1383                 CMD(start_ap, START_AP);
1384                 CMD(add_station, NEW_STATION);
1385                 CMD(add_mpath, NEW_MPATH);
1386                 CMD(update_mesh_config, SET_MESH_CONFIG);
1387                 CMD(change_bss, SET_BSS);
1388                 CMD(auth, AUTHENTICATE);
1389                 CMD(assoc, ASSOCIATE);
1390                 CMD(deauth, DEAUTHENTICATE);
1391                 CMD(disassoc, DISASSOCIATE);
1392                 CMD(join_ibss, JOIN_IBSS);
1393                 CMD(join_mesh, JOIN_MESH);
1394                 CMD(set_pmksa, SET_PMKSA);
1395                 CMD(del_pmksa, DEL_PMKSA);
1396                 CMD(flush_pmksa, FLUSH_PMKSA);
1397                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1398                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1399                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1400                 CMD(mgmt_tx, FRAME);
1401                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1402                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1403                         i++;
1404                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1405                                 goto nla_put_failure;
1406                 }
1407                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1408                     dev->ops->join_mesh) {
1409                         i++;
1410                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1411                                 goto nla_put_failure;
1412                 }
1413                 CMD(set_wds_peer, SET_WDS_PEER);
1414                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1415                         CMD(tdls_mgmt, TDLS_MGMT);
1416                         CMD(tdls_oper, TDLS_OPER);
1417                 }
1418                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1419                         CMD(sched_scan_start, START_SCHED_SCAN);
1420                 CMD(probe_client, PROBE_CLIENT);
1421                 CMD(set_noack_map, SET_NOACK_MAP);
1422                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1423                         i++;
1424                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1425                                 goto nla_put_failure;
1426                 }
1427                 CMD(start_p2p_device, START_P2P_DEVICE);
1428                 CMD(set_mcast_rate, SET_MCAST_RATE);
1429                 if (state->split) {
1430                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1431                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1432                         if (dev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1433                                 CMD(channel_switch, CHANNEL_SWITCH);
1434                 }
1435
1436 #ifdef CONFIG_NL80211_TESTMODE
1437                 CMD(testmode_cmd, TESTMODE);
1438 #endif
1439
1440 #undef CMD
1441
1442                 if (dev->ops->connect || dev->ops->auth) {
1443                         i++;
1444                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1445                                 goto nla_put_failure;
1446                 }
1447
1448                 if (dev->ops->disconnect || dev->ops->deauth) {
1449                         i++;
1450                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1451                                 goto nla_put_failure;
1452                 }
1453
1454                 nla_nest_end(msg, nl_cmds);
1455                 state->split_start++;
1456                 if (state->split)
1457                         break;
1458         case 5:
1459                 if (dev->ops->remain_on_channel &&
1460                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1461                     nla_put_u32(msg,
1462                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1463                                 dev->wiphy.max_remain_on_channel_duration))
1464                         goto nla_put_failure;
1465
1466                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1467                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1468                         goto nla_put_failure;
1469
1470                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1471                         goto nla_put_failure;
1472                 state->split_start++;
1473                 if (state->split)
1474                         break;
1475         case 6:
1476 #ifdef CONFIG_PM
1477                 if (nl80211_send_wowlan(msg, dev, state->split))
1478                         goto nla_put_failure;
1479                 state->split_start++;
1480                 if (state->split)
1481                         break;
1482 #else
1483                 state->split_start++;
1484 #endif
1485         case 7:
1486                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1487                                         dev->wiphy.software_iftypes))
1488                         goto nla_put_failure;
1489
1490                 if (nl80211_put_iface_combinations(&dev->wiphy, msg,
1491                                                    state->split))
1492                         goto nla_put_failure;
1493
1494                 state->split_start++;
1495                 if (state->split)
1496                         break;
1497         case 8:
1498                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1499                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1500                                 dev->wiphy.ap_sme_capa))
1501                         goto nla_put_failure;
1502
1503                 features = dev->wiphy.features;
1504                 /*
1505                  * We can only add the per-channel limit information if the
1506                  * dump is split, otherwise it makes it too big. Therefore
1507                  * only advertise it in that case.
1508                  */
1509                 if (state->split)
1510                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1511                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1512                         goto nla_put_failure;
1513
1514                 if (dev->wiphy.ht_capa_mod_mask &&
1515                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1516                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1517                             dev->wiphy.ht_capa_mod_mask))
1518                         goto nla_put_failure;
1519
1520                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1521                     dev->wiphy.max_acl_mac_addrs &&
1522                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1523                                 dev->wiphy.max_acl_mac_addrs))
1524                         goto nla_put_failure;
1525
1526                 /*
1527                  * Any information below this point is only available to
1528                  * applications that can deal with it being split. This
1529                  * helps ensure that newly added capabilities don't break
1530                  * older tools by overrunning their buffers.
1531                  *
1532                  * We still increment split_start so that in the split
1533                  * case we'll continue with more data in the next round,
1534                  * but break unconditionally so unsplit data stops here.
1535                  */
1536                 state->split_start++;
1537                 break;
1538         case 9:
1539                 if (dev->wiphy.extended_capabilities &&
1540                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1541                              dev->wiphy.extended_capabilities_len,
1542                              dev->wiphy.extended_capabilities) ||
1543                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1544                              dev->wiphy.extended_capabilities_len,
1545                              dev->wiphy.extended_capabilities_mask)))
1546                         goto nla_put_failure;
1547
1548                 if (dev->wiphy.vht_capa_mod_mask &&
1549                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1550                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1551                             dev->wiphy.vht_capa_mod_mask))
1552                         goto nla_put_failure;
1553
1554                 state->split_start++;
1555                 break;
1556         case 10:
1557                 if (nl80211_send_coalesce(msg, dev))
1558                         goto nla_put_failure;
1559
1560                 /* done */
1561                 state->split_start = 0;
1562                 break;
1563         }
1564         return genlmsg_end(msg, hdr);
1565
1566  nla_put_failure:
1567         genlmsg_cancel(msg, hdr);
1568         return -EMSGSIZE;
1569 }
1570
1571 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1572                                     struct netlink_callback *cb,
1573                                     struct nl80211_dump_wiphy_state *state)
1574 {
1575         struct nlattr **tb = nl80211_fam.attrbuf;
1576         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1577                               tb, nl80211_fam.maxattr, nl80211_policy);
1578         /* ignore parse errors for backward compatibility */
1579         if (ret)
1580                 return 0;
1581
1582         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1583         if (tb[NL80211_ATTR_WIPHY])
1584                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1585         if (tb[NL80211_ATTR_WDEV])
1586                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1587         if (tb[NL80211_ATTR_IFINDEX]) {
1588                 struct net_device *netdev;
1589                 struct cfg80211_registered_device *rdev;
1590                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1591
1592                 netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1593                 if (!netdev)
1594                         return -ENODEV;
1595                 if (netdev->ieee80211_ptr) {
1596                         rdev = wiphy_to_dev(
1597                                 netdev->ieee80211_ptr->wiphy);
1598                         state->filter_wiphy = rdev->wiphy_idx;
1599                 }
1600                 dev_put(netdev);
1601         }
1602
1603         return 0;
1604 }
1605
1606 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1607 {
1608         int idx = 0, ret;
1609         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1610         struct cfg80211_registered_device *dev;
1611
1612         rtnl_lock();
1613         if (!state) {
1614                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1615                 if (!state) {
1616                         rtnl_unlock();
1617                         return -ENOMEM;
1618                 }
1619                 state->filter_wiphy = -1;
1620                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1621                 if (ret) {
1622                         kfree(state);
1623                         rtnl_unlock();
1624                         return ret;
1625                 }
1626                 cb->args[0] = (long)state;
1627         }
1628
1629         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1630                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1631                         continue;
1632                 if (++idx <= state->start)
1633                         continue;
1634                 if (state->filter_wiphy != -1 &&
1635                     state->filter_wiphy != dev->wiphy_idx)
1636                         continue;
1637                 /* attempt to fit multiple wiphy data chunks into the skb */
1638                 do {
1639                         ret = nl80211_send_wiphy(dev, skb,
1640                                                  NETLINK_CB(cb->skb).portid,
1641                                                  cb->nlh->nlmsg_seq,
1642                                                  NLM_F_MULTI, state);
1643                         if (ret < 0) {
1644                                 /*
1645                                  * If sending the wiphy data didn't fit (ENOBUFS
1646                                  * or EMSGSIZE returned), this SKB is still
1647                                  * empty (so it's not too big because another
1648                                  * wiphy dataset is already in the skb) and
1649                                  * we've not tried to adjust the dump allocation
1650                                  * yet ... then adjust the alloc size to be
1651                                  * bigger, and return 1 but with the empty skb.
1652                                  * This results in an empty message being RX'ed
1653                                  * in userspace, but that is ignored.
1654                                  *
1655                                  * We can then retry with the larger buffer.
1656                                  */
1657                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1658                                     !skb->len &&
1659                                     cb->min_dump_alloc < 4096) {
1660                                         cb->min_dump_alloc = 4096;
1661                                         rtnl_unlock();
1662                                         return 1;
1663                                 }
1664                                 idx--;
1665                                 break;
1666                         }
1667                 } while (state->split_start > 0);
1668                 break;
1669         }
1670         rtnl_unlock();
1671
1672         state->start = idx;
1673
1674         return skb->len;
1675 }
1676
1677 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1678 {
1679         kfree((void *)cb->args[0]);
1680         return 0;
1681 }
1682
1683 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1684 {
1685         struct sk_buff *msg;
1686         struct cfg80211_registered_device *dev = info->user_ptr[0];
1687         struct nl80211_dump_wiphy_state state = {};
1688
1689         msg = nlmsg_new(4096, GFP_KERNEL);
1690         if (!msg)
1691                 return -ENOMEM;
1692
1693         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1694                                &state) < 0) {
1695                 nlmsg_free(msg);
1696                 return -ENOBUFS;
1697         }
1698
1699         return genlmsg_reply(msg, info);
1700 }
1701
1702 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1703         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1704         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1705         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1706         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1707         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1708 };
1709
1710 static int parse_txq_params(struct nlattr *tb[],
1711                             struct ieee80211_txq_params *txq_params)
1712 {
1713         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1714             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1715             !tb[NL80211_TXQ_ATTR_AIFS])
1716                 return -EINVAL;
1717
1718         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1719         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1720         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1721         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1722         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1723
1724         if (txq_params->ac >= NL80211_NUM_ACS)
1725                 return -EINVAL;
1726
1727         return 0;
1728 }
1729
1730 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1731 {
1732         /*
1733          * You can only set the channel explicitly for WDS interfaces,
1734          * all others have their channel managed via their respective
1735          * "establish a connection" command (connect, join, ...)
1736          *
1737          * For AP/GO and mesh mode, the channel can be set with the
1738          * channel userspace API, but is only stored and passed to the
1739          * low-level driver when the AP starts or the mesh is joined.
1740          * This is for backward compatibility, userspace can also give
1741          * the channel in the start-ap or join-mesh commands instead.
1742          *
1743          * Monitors are special as they are normally slaved to
1744          * whatever else is going on, so they have their own special
1745          * operation to set the monitor channel if possible.
1746          */
1747         return !wdev ||
1748                 wdev->iftype == NL80211_IFTYPE_AP ||
1749                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1750                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1751                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1752 }
1753
1754 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1755                                  struct genl_info *info,
1756                                  struct cfg80211_chan_def *chandef)
1757 {
1758         u32 control_freq;
1759
1760         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1761                 return -EINVAL;
1762
1763         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1764
1765         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1766         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1767         chandef->center_freq1 = control_freq;
1768         chandef->center_freq2 = 0;
1769
1770         /* Primary channel not allowed */
1771         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1772                 return -EINVAL;
1773
1774         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1775                 enum nl80211_channel_type chantype;
1776
1777                 chantype = nla_get_u32(
1778                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1779
1780                 switch (chantype) {
1781                 case NL80211_CHAN_NO_HT:
1782                 case NL80211_CHAN_HT20:
1783                 case NL80211_CHAN_HT40PLUS:
1784                 case NL80211_CHAN_HT40MINUS:
1785                         cfg80211_chandef_create(chandef, chandef->chan,
1786                                                 chantype);
1787                         break;
1788                 default:
1789                         return -EINVAL;
1790                 }
1791         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1792                 chandef->width =
1793                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1794                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1795                         chandef->center_freq1 =
1796                                 nla_get_u32(
1797                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1798                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1799                         chandef->center_freq2 =
1800                                 nla_get_u32(
1801                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1802         }
1803
1804         if (!cfg80211_chandef_valid(chandef))
1805                 return -EINVAL;
1806
1807         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1808                                      IEEE80211_CHAN_DISABLED))
1809                 return -EINVAL;
1810
1811         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1812              chandef->width == NL80211_CHAN_WIDTH_10) &&
1813             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1814                 return -EINVAL;
1815
1816         return 0;
1817 }
1818
1819 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1820                                  struct wireless_dev *wdev,
1821                                  struct genl_info *info)
1822 {
1823         struct cfg80211_chan_def chandef;
1824         int result;
1825         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1826
1827         if (wdev)
1828                 iftype = wdev->iftype;
1829
1830         if (!nl80211_can_set_dev_channel(wdev))
1831                 return -EOPNOTSUPP;
1832
1833         result = nl80211_parse_chandef(rdev, info, &chandef);
1834         if (result)
1835                 return result;
1836
1837         switch (iftype) {
1838         case NL80211_IFTYPE_AP:
1839         case NL80211_IFTYPE_P2P_GO:
1840                 if (wdev->beacon_interval) {
1841                         result = -EBUSY;
1842                         break;
1843                 }
1844                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1845                         result = -EINVAL;
1846                         break;
1847                 }
1848                 wdev->preset_chandef = chandef;
1849                 result = 0;
1850                 break;
1851         case NL80211_IFTYPE_MESH_POINT:
1852                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1853                 break;
1854         case NL80211_IFTYPE_MONITOR:
1855                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1856                 break;
1857         default:
1858                 result = -EINVAL;
1859         }
1860
1861         return result;
1862 }
1863
1864 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1865 {
1866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1867         struct net_device *netdev = info->user_ptr[1];
1868
1869         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1870 }
1871
1872 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1873 {
1874         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1875         struct net_device *dev = info->user_ptr[1];
1876         struct wireless_dev *wdev = dev->ieee80211_ptr;
1877         const u8 *bssid;
1878
1879         if (!info->attrs[NL80211_ATTR_MAC])
1880                 return -EINVAL;
1881
1882         if (netif_running(dev))
1883                 return -EBUSY;
1884
1885         if (!rdev->ops->set_wds_peer)
1886                 return -EOPNOTSUPP;
1887
1888         if (wdev->iftype != NL80211_IFTYPE_WDS)
1889                 return -EOPNOTSUPP;
1890
1891         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1892         return rdev_set_wds_peer(rdev, dev, bssid);
1893 }
1894
1895
1896 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1897 {
1898         struct cfg80211_registered_device *rdev;
1899         struct net_device *netdev = NULL;
1900         struct wireless_dev *wdev;
1901         int result = 0, rem_txq_params = 0;
1902         struct nlattr *nl_txq_params;
1903         u32 changed;
1904         u8 retry_short = 0, retry_long = 0;
1905         u32 frag_threshold = 0, rts_threshold = 0;
1906         u8 coverage_class = 0;
1907
1908         ASSERT_RTNL();
1909
1910         /*
1911          * Try to find the wiphy and netdev. Normally this
1912          * function shouldn't need the netdev, but this is
1913          * done for backward compatibility -- previously
1914          * setting the channel was done per wiphy, but now
1915          * it is per netdev. Previous userland like hostapd
1916          * also passed a netdev to set_wiphy, so that it is
1917          * possible to let that go to the right netdev!
1918          */
1919
1920         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1921                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1922
1923                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1924                 if (netdev && netdev->ieee80211_ptr)
1925                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1926                 else
1927                         netdev = NULL;
1928         }
1929
1930         if (!netdev) {
1931                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1932                                                   info->attrs);
1933                 if (IS_ERR(rdev))
1934                         return PTR_ERR(rdev);
1935                 wdev = NULL;
1936                 netdev = NULL;
1937                 result = 0;
1938         } else
1939                 wdev = netdev->ieee80211_ptr;
1940
1941         /*
1942          * end workaround code, by now the rdev is available
1943          * and locked, and wdev may or may not be NULL.
1944          */
1945
1946         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1947                 result = cfg80211_dev_rename(
1948                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1949
1950         if (result)
1951                 goto bad_res;
1952
1953         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1954                 struct ieee80211_txq_params txq_params;
1955                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1956
1957                 if (!rdev->ops->set_txq_params) {
1958                         result = -EOPNOTSUPP;
1959                         goto bad_res;
1960                 }
1961
1962                 if (!netdev) {
1963                         result = -EINVAL;
1964                         goto bad_res;
1965                 }
1966
1967                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1968                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1969                         result = -EINVAL;
1970                         goto bad_res;
1971                 }
1972
1973                 if (!netif_running(netdev)) {
1974                         result = -ENETDOWN;
1975                         goto bad_res;
1976                 }
1977
1978                 nla_for_each_nested(nl_txq_params,
1979                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1980                                     rem_txq_params) {
1981                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1982                                   nla_data(nl_txq_params),
1983                                   nla_len(nl_txq_params),
1984                                   txq_params_policy);
1985                         result = parse_txq_params(tb, &txq_params);
1986                         if (result)
1987                                 goto bad_res;
1988
1989                         result = rdev_set_txq_params(rdev, netdev,
1990                                                      &txq_params);
1991                         if (result)
1992                                 goto bad_res;
1993                 }
1994         }
1995
1996         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1997                 result = __nl80211_set_channel(rdev,
1998                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1999                                 info);
2000                 if (result)
2001                         goto bad_res;
2002         }
2003
2004         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2005                 struct wireless_dev *txp_wdev = wdev;
2006                 enum nl80211_tx_power_setting type;
2007                 int idx, mbm = 0;
2008
2009                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2010                         txp_wdev = NULL;
2011
2012                 if (!rdev->ops->set_tx_power) {
2013                         result = -EOPNOTSUPP;
2014                         goto bad_res;
2015                 }
2016
2017                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2018                 type = nla_get_u32(info->attrs[idx]);
2019
2020                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2021                     (type != NL80211_TX_POWER_AUTOMATIC)) {
2022                         result = -EINVAL;
2023                         goto bad_res;
2024                 }
2025
2026                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2027                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2028                         mbm = nla_get_u32(info->attrs[idx]);
2029                 }
2030
2031                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2032                 if (result)
2033                         goto bad_res;
2034         }
2035
2036         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2037             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2038                 u32 tx_ant, rx_ant;
2039                 if ((!rdev->wiphy.available_antennas_tx &&
2040                      !rdev->wiphy.available_antennas_rx) ||
2041                     !rdev->ops->set_antenna) {
2042                         result = -EOPNOTSUPP;
2043                         goto bad_res;
2044                 }
2045
2046                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2047                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2048
2049                 /* reject antenna configurations which don't match the
2050                  * available antenna masks, except for the "all" mask */
2051                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2052                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2053                         result = -EINVAL;
2054                         goto bad_res;
2055                 }
2056
2057                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2058                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2059
2060                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2061                 if (result)
2062                         goto bad_res;
2063         }
2064
2065         changed = 0;
2066
2067         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2068                 retry_short = nla_get_u8(
2069                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2070                 if (retry_short == 0) {
2071                         result = -EINVAL;
2072                         goto bad_res;
2073                 }
2074                 changed |= WIPHY_PARAM_RETRY_SHORT;
2075         }
2076
2077         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2078                 retry_long = nla_get_u8(
2079                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2080                 if (retry_long == 0) {
2081                         result = -EINVAL;
2082                         goto bad_res;
2083                 }
2084                 changed |= WIPHY_PARAM_RETRY_LONG;
2085         }
2086
2087         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2088                 frag_threshold = nla_get_u32(
2089                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2090                 if (frag_threshold < 256) {
2091                         result = -EINVAL;
2092                         goto bad_res;
2093                 }
2094                 if (frag_threshold != (u32) -1) {
2095                         /*
2096                          * Fragments (apart from the last one) are required to
2097                          * have even length. Make the fragmentation code
2098                          * simpler by stripping LSB should someone try to use
2099                          * odd threshold value.
2100                          */
2101                         frag_threshold &= ~0x1;
2102                 }
2103                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2104         }
2105
2106         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2107                 rts_threshold = nla_get_u32(
2108                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2109                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2110         }
2111
2112         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2113                 coverage_class = nla_get_u8(
2114                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2115                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2116         }
2117
2118         if (changed) {
2119                 u8 old_retry_short, old_retry_long;
2120                 u32 old_frag_threshold, old_rts_threshold;
2121                 u8 old_coverage_class;
2122
2123                 if (!rdev->ops->set_wiphy_params) {
2124                         result = -EOPNOTSUPP;
2125                         goto bad_res;
2126                 }
2127
2128                 old_retry_short = rdev->wiphy.retry_short;
2129                 old_retry_long = rdev->wiphy.retry_long;
2130                 old_frag_threshold = rdev->wiphy.frag_threshold;
2131                 old_rts_threshold = rdev->wiphy.rts_threshold;
2132                 old_coverage_class = rdev->wiphy.coverage_class;
2133
2134                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2135                         rdev->wiphy.retry_short = retry_short;
2136                 if (changed & WIPHY_PARAM_RETRY_LONG)
2137                         rdev->wiphy.retry_long = retry_long;
2138                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2139                         rdev->wiphy.frag_threshold = frag_threshold;
2140                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2141                         rdev->wiphy.rts_threshold = rts_threshold;
2142                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2143                         rdev->wiphy.coverage_class = coverage_class;
2144
2145                 result = rdev_set_wiphy_params(rdev, changed);
2146                 if (result) {
2147                         rdev->wiphy.retry_short = old_retry_short;
2148                         rdev->wiphy.retry_long = old_retry_long;
2149                         rdev->wiphy.frag_threshold = old_frag_threshold;
2150                         rdev->wiphy.rts_threshold = old_rts_threshold;
2151                         rdev->wiphy.coverage_class = old_coverage_class;
2152                 }
2153         }
2154
2155  bad_res:
2156         if (netdev)
2157                 dev_put(netdev);
2158         return result;
2159 }
2160
2161 static inline u64 wdev_id(struct wireless_dev *wdev)
2162 {
2163         return (u64)wdev->identifier |
2164                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2165 }
2166
2167 static int nl80211_send_chandef(struct sk_buff *msg,
2168                                  struct cfg80211_chan_def *chandef)
2169 {
2170         WARN_ON(!cfg80211_chandef_valid(chandef));
2171
2172         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2173                         chandef->chan->center_freq))
2174                 return -ENOBUFS;
2175         switch (chandef->width) {
2176         case NL80211_CHAN_WIDTH_20_NOHT:
2177         case NL80211_CHAN_WIDTH_20:
2178         case NL80211_CHAN_WIDTH_40:
2179                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2180                                 cfg80211_get_chandef_type(chandef)))
2181                         return -ENOBUFS;
2182                 break;
2183         default:
2184                 break;
2185         }
2186         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2187                 return -ENOBUFS;
2188         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2189                 return -ENOBUFS;
2190         if (chandef->center_freq2 &&
2191             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2192                 return -ENOBUFS;
2193         return 0;
2194 }
2195
2196 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2197                               struct cfg80211_registered_device *rdev,
2198                               struct wireless_dev *wdev)
2199 {
2200         struct net_device *dev = wdev->netdev;
2201         void *hdr;
2202
2203         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2204         if (!hdr)
2205                 return -1;
2206
2207         if (dev &&
2208             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2209              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2210                 goto nla_put_failure;
2211
2212         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2213             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2214             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2215             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2216             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2217                         rdev->devlist_generation ^
2218                         (cfg80211_rdev_list_generation << 2)))
2219                 goto nla_put_failure;
2220
2221         if (rdev->ops->get_channel) {
2222                 int ret;
2223                 struct cfg80211_chan_def chandef;
2224
2225                 ret = rdev_get_channel(rdev, wdev, &chandef);
2226                 if (ret == 0) {
2227                         if (nl80211_send_chandef(msg, &chandef))
2228                                 goto nla_put_failure;
2229                 }
2230         }
2231
2232         if (wdev->ssid_len) {
2233                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2234                         goto nla_put_failure;
2235         }
2236
2237         return genlmsg_end(msg, hdr);
2238
2239  nla_put_failure:
2240         genlmsg_cancel(msg, hdr);
2241         return -EMSGSIZE;
2242 }
2243
2244 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2245 {
2246         int wp_idx = 0;
2247         int if_idx = 0;
2248         int wp_start = cb->args[0];
2249         int if_start = cb->args[1];
2250         struct cfg80211_registered_device *rdev;
2251         struct wireless_dev *wdev;
2252
2253         rtnl_lock();
2254         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2255                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2256                         continue;
2257                 if (wp_idx < wp_start) {
2258                         wp_idx++;
2259                         continue;
2260                 }
2261                 if_idx = 0;
2262
2263                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2264                         if (if_idx < if_start) {
2265                                 if_idx++;
2266                                 continue;
2267                         }
2268                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2269                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2270                                                rdev, wdev) < 0) {
2271                                 goto out;
2272                         }
2273                         if_idx++;
2274                 }
2275
2276                 wp_idx++;
2277         }
2278  out:
2279         rtnl_unlock();
2280
2281         cb->args[0] = wp_idx;
2282         cb->args[1] = if_idx;
2283
2284         return skb->len;
2285 }
2286
2287 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2288 {
2289         struct sk_buff *msg;
2290         struct cfg80211_registered_device *dev = info->user_ptr[0];
2291         struct wireless_dev *wdev = info->user_ptr[1];
2292
2293         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2294         if (!msg)
2295                 return -ENOMEM;
2296
2297         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2298                                dev, wdev) < 0) {
2299                 nlmsg_free(msg);
2300                 return -ENOBUFS;
2301         }
2302
2303         return genlmsg_reply(msg, info);
2304 }
2305
2306 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2307         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2308         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2309         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2310         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2311         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2312         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2313 };
2314
2315 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2316 {
2317         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2318         int flag;
2319
2320         *mntrflags = 0;
2321
2322         if (!nla)
2323                 return -EINVAL;
2324
2325         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2326                              nla, mntr_flags_policy))
2327                 return -EINVAL;
2328
2329         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2330                 if (flags[flag])
2331                         *mntrflags |= (1<<flag);
2332
2333         return 0;
2334 }
2335
2336 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2337                                struct net_device *netdev, u8 use_4addr,
2338                                enum nl80211_iftype iftype)
2339 {
2340         if (!use_4addr) {
2341                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2342                         return -EBUSY;
2343                 return 0;
2344         }
2345
2346         switch (iftype) {
2347         case NL80211_IFTYPE_AP_VLAN:
2348                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2349                         return 0;
2350                 break;
2351         case NL80211_IFTYPE_STATION:
2352                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2353                         return 0;
2354                 break;
2355         default:
2356                 break;
2357         }
2358
2359         return -EOPNOTSUPP;
2360 }
2361
2362 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2363 {
2364         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2365         struct vif_params params;
2366         int err;
2367         enum nl80211_iftype otype, ntype;
2368         struct net_device *dev = info->user_ptr[1];
2369         u32 _flags, *flags = NULL;
2370         bool change = false;
2371
2372         memset(&params, 0, sizeof(params));
2373
2374         otype = ntype = dev->ieee80211_ptr->iftype;
2375
2376         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2377                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2378                 if (otype != ntype)
2379                         change = true;
2380                 if (ntype > NL80211_IFTYPE_MAX)
2381                         return -EINVAL;
2382         }
2383
2384         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2385                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2386
2387                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2388                         return -EINVAL;
2389                 if (netif_running(dev))
2390                         return -EBUSY;
2391
2392                 wdev_lock(wdev);
2393                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2394                              IEEE80211_MAX_MESH_ID_LEN);
2395                 wdev->mesh_id_up_len =
2396                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2397                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2398                        wdev->mesh_id_up_len);
2399                 wdev_unlock(wdev);
2400         }
2401
2402         if (info->attrs[NL80211_ATTR_4ADDR]) {
2403                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2404                 change = true;
2405                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2406                 if (err)
2407                         return err;
2408         } else {
2409                 params.use_4addr = -1;
2410         }
2411
2412         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2413                 if (ntype != NL80211_IFTYPE_MONITOR)
2414                         return -EINVAL;
2415                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2416                                           &_flags);
2417                 if (err)
2418                         return err;
2419
2420                 flags = &_flags;
2421                 change = true;
2422         }
2423
2424         if (flags && (*flags & NL80211_MNTR_FLAG_ACTIVE) &&
2425             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2426                 return -EOPNOTSUPP;
2427
2428         if (change)
2429                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2430         else
2431                 err = 0;
2432
2433         if (!err && params.use_4addr != -1)
2434                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2435
2436         return err;
2437 }
2438
2439 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2440 {
2441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2442         struct vif_params params;
2443         struct wireless_dev *wdev;
2444         struct sk_buff *msg;
2445         int err;
2446         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2447         u32 flags;
2448
2449         memset(&params, 0, sizeof(params));
2450
2451         if (!info->attrs[NL80211_ATTR_IFNAME])
2452                 return -EINVAL;
2453
2454         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2455                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2456                 if (type > NL80211_IFTYPE_MAX)
2457                         return -EINVAL;
2458         }
2459
2460         if (!rdev->ops->add_virtual_intf ||
2461             !(rdev->wiphy.interface_modes & (1 << type)))
2462                 return -EOPNOTSUPP;
2463
2464         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2465                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2466                            ETH_ALEN);
2467                 if (!is_valid_ether_addr(params.macaddr))
2468                         return -EADDRNOTAVAIL;
2469         }
2470
2471         if (info->attrs[NL80211_ATTR_4ADDR]) {
2472                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2473                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2474                 if (err)
2475                         return err;
2476         }
2477
2478         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2479         if (!msg)
2480                 return -ENOMEM;
2481
2482         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2483                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2484                                   &flags);
2485
2486         if (!err && (flags & NL80211_MNTR_FLAG_ACTIVE) &&
2487             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2488                 return -EOPNOTSUPP;
2489
2490         wdev = rdev_add_virtual_intf(rdev,
2491                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2492                                 type, err ? NULL : &flags, &params);
2493         if (IS_ERR(wdev)) {
2494                 nlmsg_free(msg);
2495                 return PTR_ERR(wdev);
2496         }
2497
2498         switch (type) {
2499         case NL80211_IFTYPE_MESH_POINT:
2500                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2501                         break;
2502                 wdev_lock(wdev);
2503                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2504                              IEEE80211_MAX_MESH_ID_LEN);
2505                 wdev->mesh_id_up_len =
2506                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2507                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2508                        wdev->mesh_id_up_len);
2509                 wdev_unlock(wdev);
2510                 break;
2511         case NL80211_IFTYPE_P2P_DEVICE:
2512                 /*
2513                  * P2P Device doesn't have a netdev, so doesn't go
2514                  * through the netdev notifier and must be added here
2515                  */
2516                 mutex_init(&wdev->mtx);
2517                 INIT_LIST_HEAD(&wdev->event_list);
2518                 spin_lock_init(&wdev->event_lock);
2519                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2520                 spin_lock_init(&wdev->mgmt_registrations_lock);
2521
2522                 wdev->identifier = ++rdev->wdev_id;
2523                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2524                 rdev->devlist_generation++;
2525                 break;
2526         default:
2527                 break;
2528         }
2529
2530         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2531                                rdev, wdev) < 0) {
2532                 nlmsg_free(msg);
2533                 return -ENOBUFS;
2534         }
2535
2536         return genlmsg_reply(msg, info);
2537 }
2538
2539 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2540 {
2541         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2542         struct wireless_dev *wdev = info->user_ptr[1];
2543
2544         if (!rdev->ops->del_virtual_intf)
2545                 return -EOPNOTSUPP;
2546
2547         /*
2548          * If we remove a wireless device without a netdev then clear
2549          * user_ptr[1] so that nl80211_post_doit won't dereference it
2550          * to check if it needs to do dev_put(). Otherwise it crashes
2551          * since the wdev has been freed, unlike with a netdev where
2552          * we need the dev_put() for the netdev to really be freed.
2553          */
2554         if (!wdev->netdev)
2555                 info->user_ptr[1] = NULL;
2556
2557         return rdev_del_virtual_intf(rdev, wdev);
2558 }
2559
2560 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2561 {
2562         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2563         struct net_device *dev = info->user_ptr[1];
2564         u16 noack_map;
2565
2566         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2567                 return -EINVAL;
2568
2569         if (!rdev->ops->set_noack_map)
2570                 return -EOPNOTSUPP;
2571
2572         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2573
2574         return rdev_set_noack_map(rdev, dev, noack_map);
2575 }
2576
2577 struct get_key_cookie {
2578         struct sk_buff *msg;
2579         int error;
2580         int idx;
2581 };
2582
2583 static void get_key_callback(void *c, struct key_params *params)
2584 {
2585         struct nlattr *key;
2586         struct get_key_cookie *cookie = c;
2587
2588         if ((params->key &&
2589              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2590                      params->key_len, params->key)) ||
2591             (params->seq &&
2592              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2593                      params->seq_len, params->seq)) ||
2594             (params->cipher &&
2595              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2596                          params->cipher)))
2597                 goto nla_put_failure;
2598
2599         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2600         if (!key)
2601                 goto nla_put_failure;
2602
2603         if ((params->key &&
2604              nla_put(cookie->msg, NL80211_KEY_DATA,
2605                      params->key_len, params->key)) ||
2606             (params->seq &&
2607              nla_put(cookie->msg, NL80211_KEY_SEQ,
2608                      params->seq_len, params->seq)) ||
2609             (params->cipher &&
2610              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2611                          params->cipher)))
2612                 goto nla_put_failure;
2613
2614         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2615                 goto nla_put_failure;
2616
2617         nla_nest_end(cookie->msg, key);
2618
2619         return;
2620  nla_put_failure:
2621         cookie->error = 1;
2622 }
2623
2624 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2625 {
2626         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2627         int err;
2628         struct net_device *dev = info->user_ptr[1];
2629         u8 key_idx = 0;
2630         const u8 *mac_addr = NULL;
2631         bool pairwise;
2632         struct get_key_cookie cookie = {
2633                 .error = 0,
2634         };
2635         void *hdr;
2636         struct sk_buff *msg;
2637
2638         if (info->attrs[NL80211_ATTR_KEY_IDX])
2639                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2640
2641         if (key_idx > 5)
2642                 return -EINVAL;
2643
2644         if (info->attrs[NL80211_ATTR_MAC])
2645                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2646
2647         pairwise = !!mac_addr;
2648         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2649                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2650                 if (kt >= NUM_NL80211_KEYTYPES)
2651                         return -EINVAL;
2652                 if (kt != NL80211_KEYTYPE_GROUP &&
2653                     kt != NL80211_KEYTYPE_PAIRWISE)
2654                         return -EINVAL;
2655                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2656         }
2657
2658         if (!rdev->ops->get_key)
2659                 return -EOPNOTSUPP;
2660
2661         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2662         if (!msg)
2663                 return -ENOMEM;
2664
2665         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2666                              NL80211_CMD_NEW_KEY);
2667         if (!hdr)
2668                 return -ENOBUFS;
2669
2670         cookie.msg = msg;
2671         cookie.idx = key_idx;
2672
2673         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2674             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2675                 goto nla_put_failure;
2676         if (mac_addr &&
2677             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2678                 goto nla_put_failure;
2679
2680         if (pairwise && mac_addr &&
2681             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2682                 return -ENOENT;
2683
2684         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2685                            get_key_callback);
2686
2687         if (err)
2688                 goto free_msg;
2689
2690         if (cookie.error)
2691                 goto nla_put_failure;
2692
2693         genlmsg_end(msg, hdr);
2694         return genlmsg_reply(msg, info);
2695
2696  nla_put_failure:
2697         err = -ENOBUFS;
2698  free_msg:
2699         nlmsg_free(msg);
2700         return err;
2701 }
2702
2703 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2704 {
2705         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2706         struct key_parse key;
2707         int err;
2708         struct net_device *dev = info->user_ptr[1];
2709
2710         err = nl80211_parse_key(info, &key);
2711         if (err)
2712                 return err;
2713
2714         if (key.idx < 0)
2715                 return -EINVAL;
2716
2717         /* only support setting default key */
2718         if (!key.def && !key.defmgmt)
2719                 return -EINVAL;
2720
2721         wdev_lock(dev->ieee80211_ptr);
2722
2723         if (key.def) {
2724                 if (!rdev->ops->set_default_key) {
2725                         err = -EOPNOTSUPP;
2726                         goto out;
2727                 }
2728
2729                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2730                 if (err)
2731                         goto out;
2732
2733                 err = rdev_set_default_key(rdev, dev, key.idx,
2734                                                  key.def_uni, key.def_multi);
2735
2736                 if (err)
2737                         goto out;
2738
2739 #ifdef CONFIG_CFG80211_WEXT
2740                 dev->ieee80211_ptr->wext.default_key = key.idx;
2741 #endif
2742         } else {
2743                 if (key.def_uni || !key.def_multi) {
2744                         err = -EINVAL;
2745                         goto out;
2746                 }
2747
2748                 if (!rdev->ops->set_default_mgmt_key) {
2749                         err = -EOPNOTSUPP;
2750                         goto out;
2751                 }
2752
2753                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2754                 if (err)
2755                         goto out;
2756
2757                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2758                 if (err)
2759                         goto out;
2760
2761 #ifdef CONFIG_CFG80211_WEXT
2762                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2763 #endif
2764         }
2765
2766  out:
2767         wdev_unlock(dev->ieee80211_ptr);
2768
2769         return err;
2770 }
2771
2772 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2773 {
2774         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2775         int err;
2776         struct net_device *dev = info->user_ptr[1];
2777         struct key_parse key;
2778         const u8 *mac_addr = NULL;
2779
2780         err = nl80211_parse_key(info, &key);
2781         if (err)
2782                 return err;
2783
2784         if (!key.p.key)
2785                 return -EINVAL;
2786
2787         if (info->attrs[NL80211_ATTR_MAC])
2788                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2789
2790         if (key.type == -1) {
2791                 if (mac_addr)
2792                         key.type = NL80211_KEYTYPE_PAIRWISE;
2793                 else
2794                         key.type = NL80211_KEYTYPE_GROUP;
2795         }
2796
2797         /* for now */
2798         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2799             key.type != NL80211_KEYTYPE_GROUP)
2800                 return -EINVAL;
2801
2802         if (!rdev->ops->add_key)
2803                 return -EOPNOTSUPP;
2804
2805         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2806                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2807                                            mac_addr))
2808                 return -EINVAL;
2809
2810         wdev_lock(dev->ieee80211_ptr);
2811         err = nl80211_key_allowed(dev->ieee80211_ptr);
2812         if (!err)
2813                 err = rdev_add_key(rdev, dev, key.idx,
2814                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2815                                     mac_addr, &key.p);
2816         wdev_unlock(dev->ieee80211_ptr);
2817
2818         return err;
2819 }
2820
2821 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2822 {
2823         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2824         int err;
2825         struct net_device *dev = info->user_ptr[1];
2826         u8 *mac_addr = NULL;
2827         struct key_parse key;
2828
2829         err = nl80211_parse_key(info, &key);
2830         if (err)
2831                 return err;
2832
2833         if (info->attrs[NL80211_ATTR_MAC])
2834                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2835
2836         if (key.type == -1) {
2837                 if (mac_addr)
2838                         key.type = NL80211_KEYTYPE_PAIRWISE;
2839                 else
2840                         key.type = NL80211_KEYTYPE_GROUP;
2841         }
2842
2843         /* for now */
2844         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2845             key.type != NL80211_KEYTYPE_GROUP)
2846                 return -EINVAL;
2847
2848         if (!rdev->ops->del_key)
2849                 return -EOPNOTSUPP;
2850
2851         wdev_lock(dev->ieee80211_ptr);
2852         err = nl80211_key_allowed(dev->ieee80211_ptr);
2853
2854         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2855             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2856                 err = -ENOENT;
2857
2858         if (!err)
2859                 err = rdev_del_key(rdev, dev, key.idx,
2860                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2861                                    mac_addr);
2862
2863 #ifdef CONFIG_CFG80211_WEXT
2864         if (!err) {
2865                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2866                         dev->ieee80211_ptr->wext.default_key = -1;
2867                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2868                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2869         }
2870 #endif
2871         wdev_unlock(dev->ieee80211_ptr);
2872
2873         return err;
2874 }
2875
2876 /* This function returns an error or the number of nested attributes */
2877 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2878 {
2879         struct nlattr *attr;
2880         int n_entries = 0, tmp;
2881
2882         nla_for_each_nested(attr, nl_attr, tmp) {
2883                 if (nla_len(attr) != ETH_ALEN)
2884                         return -EINVAL;
2885
2886                 n_entries++;
2887         }
2888
2889         return n_entries;
2890 }
2891
2892 /*
2893  * This function parses ACL information and allocates memory for ACL data.
2894  * On successful return, the calling function is responsible to free the
2895  * ACL buffer returned by this function.
2896  */
2897 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2898                                                 struct genl_info *info)
2899 {
2900         enum nl80211_acl_policy acl_policy;
2901         struct nlattr *attr;
2902         struct cfg80211_acl_data *acl;
2903         int i = 0, n_entries, tmp;
2904
2905         if (!wiphy->max_acl_mac_addrs)
2906                 return ERR_PTR(-EOPNOTSUPP);
2907
2908         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2909                 return ERR_PTR(-EINVAL);
2910
2911         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2912         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2913             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2914                 return ERR_PTR(-EINVAL);
2915
2916         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2917                 return ERR_PTR(-EINVAL);
2918
2919         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2920         if (n_entries < 0)
2921                 return ERR_PTR(n_entries);
2922
2923         if (n_entries > wiphy->max_acl_mac_addrs)
2924                 return ERR_PTR(-ENOTSUPP);
2925
2926         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2927                       GFP_KERNEL);
2928         if (!acl)
2929                 return ERR_PTR(-ENOMEM);
2930
2931         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2932                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2933                 i++;
2934         }
2935
2936         acl->n_acl_entries = n_entries;
2937         acl->acl_policy = acl_policy;
2938
2939         return acl;
2940 }
2941
2942 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2943 {
2944         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2945         struct net_device *dev = info->user_ptr[1];
2946         struct cfg80211_acl_data *acl;
2947         int err;
2948
2949         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2950             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2951                 return -EOPNOTSUPP;
2952
2953         if (!dev->ieee80211_ptr->beacon_interval)
2954                 return -EINVAL;
2955
2956         acl = parse_acl_data(&rdev->wiphy, info);
2957         if (IS_ERR(acl))
2958                 return PTR_ERR(acl);
2959
2960         err = rdev_set_mac_acl(rdev, dev, acl);
2961
2962         kfree(acl);
2963
2964         return err;
2965 }
2966
2967 static int nl80211_parse_beacon(struct nlattr *attrs[],
2968                                 struct cfg80211_beacon_data *bcn)
2969 {
2970         bool haveinfo = false;
2971
2972         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
2973             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
2974             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2975             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2976                 return -EINVAL;
2977
2978         memset(bcn, 0, sizeof(*bcn));
2979
2980         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
2981                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
2982                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
2983                 if (!bcn->head_len)
2984                         return -EINVAL;
2985                 haveinfo = true;
2986         }
2987
2988         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
2989                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
2990                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
2991                 haveinfo = true;
2992         }
2993
2994         if (!haveinfo)
2995                 return -EINVAL;
2996
2997         if (attrs[NL80211_ATTR_IE]) {
2998                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
2999                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3000         }
3001
3002         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3003                 bcn->proberesp_ies =
3004                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3005                 bcn->proberesp_ies_len =
3006                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3007         }
3008
3009         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3010                 bcn->assocresp_ies =
3011                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3012                 bcn->assocresp_ies_len =
3013                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3014         }
3015
3016         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3017                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3018                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3019         }
3020
3021         return 0;
3022 }
3023
3024 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3025                                    struct cfg80211_ap_settings *params)
3026 {
3027         struct wireless_dev *wdev;
3028         bool ret = false;
3029
3030         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3031                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3032                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3033                         continue;
3034
3035                 if (!wdev->preset_chandef.chan)
3036                         continue;
3037
3038                 params->chandef = wdev->preset_chandef;
3039                 ret = true;
3040                 break;
3041         }
3042
3043         return ret;
3044 }
3045
3046 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3047                                     enum nl80211_auth_type auth_type,
3048                                     enum nl80211_commands cmd)
3049 {
3050         if (auth_type > NL80211_AUTHTYPE_MAX)
3051                 return false;
3052
3053         switch (cmd) {
3054         case NL80211_CMD_AUTHENTICATE:
3055                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3056                     auth_type == NL80211_AUTHTYPE_SAE)
3057                         return false;
3058                 return true;
3059         case NL80211_CMD_CONNECT:
3060         case NL80211_CMD_START_AP:
3061                 /* SAE not supported yet */
3062                 if (auth_type == NL80211_AUTHTYPE_SAE)
3063                         return false;
3064                 return true;
3065         default:
3066                 return false;
3067         }
3068 }
3069
3070 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3071 {
3072         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3073         struct net_device *dev = info->user_ptr[1];
3074         struct wireless_dev *wdev = dev->ieee80211_ptr;
3075         struct cfg80211_ap_settings params;
3076         int err;
3077         u8 radar_detect_width = 0;
3078
3079         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3080             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3081                 return -EOPNOTSUPP;
3082
3083         if (!rdev->ops->start_ap)
3084                 return -EOPNOTSUPP;
3085
3086         if (wdev->beacon_interval)
3087                 return -EALREADY;
3088
3089         memset(&params, 0, sizeof(params));
3090
3091         /* these are required for START_AP */
3092         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3093             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3094             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3095                 return -EINVAL;
3096
3097         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3098         if (err)
3099                 return err;
3100
3101         params.beacon_interval =
3102                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3103         params.dtim_period =
3104                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3105
3106         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3107         if (err)
3108                 return err;
3109
3110         /*
3111          * In theory, some of these attributes should be required here
3112          * but since they were not used when the command was originally
3113          * added, keep them optional for old user space programs to let
3114          * them continue to work with drivers that do not need the
3115          * additional information -- drivers must check!
3116          */
3117         if (info->attrs[NL80211_ATTR_SSID]) {
3118                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3119                 params.ssid_len =
3120                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3121                 if (params.ssid_len == 0 ||
3122                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3123                         return -EINVAL;
3124         }
3125
3126         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3127                 params.hidden_ssid = nla_get_u32(
3128                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3129                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3130                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3131                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3132                         return -EINVAL;
3133         }
3134
3135         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3136
3137         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3138                 params.auth_type = nla_get_u32(
3139                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3140                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3141                                              NL80211_CMD_START_AP))
3142                         return -EINVAL;
3143         } else
3144                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3145
3146         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3147                                       NL80211_MAX_NR_CIPHER_SUITES);
3148         if (err)
3149                 return err;
3150
3151         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3152                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3153                         return -EOPNOTSUPP;
3154                 params.inactivity_timeout = nla_get_u16(
3155                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3156         }
3157
3158         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3159                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3160                         return -EINVAL;
3161                 params.p2p_ctwindow =
3162                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3163                 if (params.p2p_ctwindow > 127)
3164                         return -EINVAL;
3165                 if (params.p2p_ctwindow != 0 &&
3166                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3167                         return -EINVAL;
3168         }
3169
3170         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3171                 u8 tmp;
3172
3173                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3174                         return -EINVAL;
3175                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3176                 if (tmp > 1)
3177                         return -EINVAL;
3178                 params.p2p_opp_ps = tmp;
3179                 if (params.p2p_opp_ps != 0 &&
3180                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3181                         return -EINVAL;
3182         }
3183
3184         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3185                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3186                 if (err)
3187                         return err;
3188         } else if (wdev->preset_chandef.chan) {
3189                 params.chandef = wdev->preset_chandef;
3190         } else if (!nl80211_get_ap_channel(rdev, &params))
3191                 return -EINVAL;
3192
3193         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3194                 return -EINVAL;
3195
3196         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3197         if (err < 0)
3198                 return err;
3199         if (err) {
3200                 radar_detect_width = BIT(params.chandef.width);
3201                 params.radar_required = true;
3202         }
3203
3204         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3205                                            params.chandef.chan,
3206                                            CHAN_MODE_SHARED,
3207                                            radar_detect_width);
3208         if (err)
3209                 return err;
3210
3211         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3212                 params.acl = parse_acl_data(&rdev->wiphy, info);
3213                 if (IS_ERR(params.acl))
3214                         return PTR_ERR(params.acl);
3215         }
3216
3217         err = rdev_start_ap(rdev, dev, &params);
3218         if (!err) {
3219                 wdev->preset_chandef = params.chandef;
3220                 wdev->beacon_interval = params.beacon_interval;
3221                 wdev->channel = params.chandef.chan;
3222                 wdev->ssid_len = params.ssid_len;
3223                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3224         }
3225
3226         kfree(params.acl);
3227
3228         return err;
3229 }
3230
3231 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3232 {
3233         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3234         struct net_device *dev = info->user_ptr[1];
3235         struct wireless_dev *wdev = dev->ieee80211_ptr;
3236         struct cfg80211_beacon_data params;
3237         int err;
3238
3239         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3240             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3241                 return -EOPNOTSUPP;
3242
3243         if (!rdev->ops->change_beacon)
3244                 return -EOPNOTSUPP;
3245
3246         if (!wdev->beacon_interval)
3247                 return -EINVAL;
3248
3249         err = nl80211_parse_beacon(info->attrs, &params);
3250         if (err)
3251                 return err;
3252
3253         return rdev_change_beacon(rdev, dev, &params);
3254 }
3255
3256 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3257 {
3258         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3259         struct net_device *dev = info->user_ptr[1];
3260
3261         return cfg80211_stop_ap(rdev, dev);
3262 }
3263
3264 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3265         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3266         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3267         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3268         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3269         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3270         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3271 };
3272
3273 static int parse_station_flags(struct genl_info *info,
3274                                enum nl80211_iftype iftype,
3275                                struct station_parameters *params)
3276 {
3277         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3278         struct nlattr *nla;
3279         int flag;
3280
3281         /*
3282          * Try parsing the new attribute first so userspace
3283          * can specify both for older kernels.
3284          */
3285         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3286         if (nla) {
3287                 struct nl80211_sta_flag_update *sta_flags;
3288
3289                 sta_flags = nla_data(nla);
3290                 params->sta_flags_mask = sta_flags->mask;
3291                 params->sta_flags_set = sta_flags->set;
3292                 params->sta_flags_set &= params->sta_flags_mask;
3293                 if ((params->sta_flags_mask |
3294                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3295                         return -EINVAL;
3296                 return 0;
3297         }
3298
3299         /* if present, parse the old attribute */
3300
3301         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3302         if (!nla)
3303                 return 0;
3304
3305         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3306                              nla, sta_flags_policy))
3307                 return -EINVAL;
3308
3309         /*
3310          * Only allow certain flags for interface types so that
3311          * other attributes are silently ignored. Remember that
3312          * this is backward compatibility code with old userspace
3313          * and shouldn't be hit in other cases anyway.
3314          */
3315         switch (iftype) {
3316         case NL80211_IFTYPE_AP:
3317         case NL80211_IFTYPE_AP_VLAN:
3318         case NL80211_IFTYPE_P2P_GO:
3319                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3320                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3321                                          BIT(NL80211_STA_FLAG_WME) |
3322                                          BIT(NL80211_STA_FLAG_MFP);
3323                 break;
3324         case NL80211_IFTYPE_P2P_CLIENT:
3325         case NL80211_IFTYPE_STATION:
3326                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3327                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3328                 break;
3329         case NL80211_IFTYPE_MESH_POINT:
3330                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3331                                          BIT(NL80211_STA_FLAG_MFP) |
3332                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3333         default:
3334                 return -EINVAL;
3335         }
3336
3337         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3338                 if (flags[flag]) {
3339                         params->sta_flags_set |= (1<<flag);
3340
3341                         /* no longer support new API additions in old API */
3342                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3343                                 return -EINVAL;
3344                 }
3345         }
3346
3347         return 0;
3348 }
3349
3350 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3351                                  int attr)
3352 {
3353         struct nlattr *rate;
3354         u32 bitrate;
3355         u16 bitrate_compat;
3356
3357         rate = nla_nest_start(msg, attr);
3358         if (!rate)
3359                 return false;
3360
3361         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3362         bitrate = cfg80211_calculate_bitrate(info);
3363         /* report 16-bit bitrate only if we can */
3364         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3365         if (bitrate > 0 &&
3366             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3367                 return false;
3368         if (bitrate_compat > 0 &&
3369             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3370                 return false;
3371
3372         if (info->flags & RATE_INFO_FLAGS_MCS) {
3373                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3374                         return false;
3375                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3376                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3377                         return false;
3378                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3379                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3380                         return false;
3381         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3382                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3383                         return false;
3384                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3385                         return false;
3386                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3387                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3388                         return false;
3389                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3390                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3391                         return false;
3392                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3393                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3394                         return false;
3395                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3396                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3397                         return false;
3398                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3399                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3400                         return false;
3401         }
3402
3403         nla_nest_end(msg, rate);
3404         return true;
3405 }
3406
3407 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3408                                int id)
3409 {
3410         void *attr;
3411         int i = 0;
3412
3413         if (!mask)
3414                 return true;
3415
3416         attr = nla_nest_start(msg, id);
3417         if (!attr)
3418                 return false;
3419
3420         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3421                 if (!(mask & BIT(i)))
3422                         continue;
3423
3424                 if (nla_put_u8(msg, i, signal[i]))
3425                         return false;
3426         }
3427
3428         nla_nest_end(msg, attr);
3429
3430         return true;
3431 }
3432
3433 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3434                                 int flags,
3435                                 struct cfg80211_registered_device *rdev,
3436                                 struct net_device *dev,
3437                                 const u8 *mac_addr, struct station_info *sinfo)
3438 {
3439         void *hdr;
3440         struct nlattr *sinfoattr, *bss_param;
3441
3442         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3443         if (!hdr)
3444                 return -1;
3445
3446         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3447             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3448             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3449                 goto nla_put_failure;
3450
3451         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3452         if (!sinfoattr)
3453                 goto nla_put_failure;
3454         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3455             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3456                         sinfo->connected_time))
3457                 goto nla_put_failure;
3458         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3459             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3460                         sinfo->inactive_time))
3461                 goto nla_put_failure;
3462         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3463                               STATION_INFO_RX_BYTES64)) &&
3464             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3465                         (u32)sinfo->rx_bytes))
3466                 goto nla_put_failure;
3467         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3468                               STATION_INFO_TX_BYTES64)) &&
3469             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3470                         (u32)sinfo->tx_bytes))
3471                 goto nla_put_failure;
3472         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3473             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3474                         sinfo->rx_bytes))
3475                 goto nla_put_failure;
3476         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3477             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3478                         sinfo->tx_bytes))
3479                 goto nla_put_failure;
3480         if ((sinfo->filled & STATION_INFO_LLID) &&
3481             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3482                 goto nla_put_failure;
3483         if ((sinfo->filled & STATION_INFO_PLID) &&
3484             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3485                 goto nla_put_failure;
3486         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3487             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3488                        sinfo->plink_state))
3489                 goto nla_put_failure;
3490         switch (rdev->wiphy.signal_type) {
3491         case CFG80211_SIGNAL_TYPE_MBM:
3492                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3493                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3494                                sinfo->signal))
3495                         goto nla_put_failure;
3496                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3497                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3498                                sinfo->signal_avg))
3499                         goto nla_put_failure;
3500                 break;
3501         default:
3502                 break;
3503         }
3504         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3505                 if (!nl80211_put_signal(msg, sinfo->chains,
3506                                         sinfo->chain_signal,
3507                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3508                         goto nla_put_failure;
3509         }
3510         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3511                 if (!nl80211_put_signal(msg, sinfo->chains,
3512                                         sinfo->chain_signal_avg,
3513                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3514                         goto nla_put_failure;
3515         }
3516         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3517                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3518                                           NL80211_STA_INFO_TX_BITRATE))
3519                         goto nla_put_failure;
3520         }
3521         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3522                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3523                                           NL80211_STA_INFO_RX_BITRATE))
3524                         goto nla_put_failure;
3525         }
3526         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3527             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3528                         sinfo->rx_packets))
3529                 goto nla_put_failure;
3530         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3531             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3532                         sinfo->tx_packets))
3533                 goto nla_put_failure;
3534         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3535             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3536                         sinfo->tx_retries))
3537                 goto nla_put_failure;
3538         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3539             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3540                         sinfo->tx_failed))
3541                 goto nla_put_failure;
3542         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3543             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3544                         sinfo->beacon_loss_count))
3545                 goto nla_put_failure;
3546         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3547             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3548                         sinfo->local_pm))
3549                 goto nla_put_failure;
3550         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3551             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3552                         sinfo->peer_pm))
3553                 goto nla_put_failure;
3554         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3555             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3556                         sinfo->nonpeer_pm))
3557                 goto nla_put_failure;
3558         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3559                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3560                 if (!bss_param)
3561                         goto nla_put_failure;
3562
3563                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3564                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3565                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3566                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3567                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3568                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3569                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3570                                sinfo->bss_param.dtim_period) ||
3571                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3572                                 sinfo->bss_param.beacon_interval))
3573                         goto nla_put_failure;
3574
3575                 nla_nest_end(msg, bss_param);
3576         }
3577         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3578             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3579                     sizeof(struct nl80211_sta_flag_update),
3580                     &sinfo->sta_flags))
3581                 goto nla_put_failure;
3582         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3583                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3584                             sinfo->t_offset))
3585                 goto nla_put_failure;
3586         nla_nest_end(msg, sinfoattr);
3587
3588         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3589             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3590                     sinfo->assoc_req_ies))
3591                 goto nla_put_failure;
3592
3593         return genlmsg_end(msg, hdr);
3594
3595  nla_put_failure:
3596         genlmsg_cancel(msg, hdr);
3597         return -EMSGSIZE;
3598 }
3599
3600 static int nl80211_dump_station(struct sk_buff *skb,
3601                                 struct netlink_callback *cb)
3602 {
3603         struct station_info sinfo;
3604         struct cfg80211_registered_device *dev;
3605         struct wireless_dev *wdev;
3606         u8 mac_addr[ETH_ALEN];
3607         int sta_idx = cb->args[2];
3608         int err;
3609
3610         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3611         if (err)
3612                 return err;
3613
3614         if (!wdev->netdev) {
3615                 err = -EINVAL;
3616                 goto out_err;
3617         }
3618
3619         if (!dev->ops->dump_station) {
3620                 err = -EOPNOTSUPP;
3621                 goto out_err;
3622         }
3623
3624         while (1) {
3625                 memset(&sinfo, 0, sizeof(sinfo));
3626                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3627                                         mac_addr, &sinfo);
3628                 if (err == -ENOENT)
3629                         break;
3630                 if (err)
3631                         goto out_err;
3632
3633                 if (nl80211_send_station(skb,
3634                                 NETLINK_CB(cb->skb).portid,
3635                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3636                                 dev, wdev->netdev, mac_addr,
3637                                 &sinfo) < 0)
3638                         goto out;
3639
3640                 sta_idx++;
3641         }
3642
3643
3644  out:
3645         cb->args[2] = sta_idx;
3646         err = skb->len;
3647  out_err:
3648         nl80211_finish_wdev_dump(dev);
3649
3650         return err;
3651 }
3652
3653 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3654 {
3655         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3656         struct net_device *dev = info->user_ptr[1];
3657         struct station_info sinfo;
3658         struct sk_buff *msg;
3659         u8 *mac_addr = NULL;
3660         int err;
3661
3662         memset(&sinfo, 0, sizeof(sinfo));
3663
3664         if (!info->attrs[NL80211_ATTR_MAC])
3665                 return -EINVAL;
3666
3667         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3668
3669         if (!rdev->ops->get_station)
3670                 return -EOPNOTSUPP;
3671
3672         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3673         if (err)
3674                 return err;
3675
3676         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3677         if (!msg)
3678                 return -ENOMEM;
3679
3680         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3681                                  rdev, dev, mac_addr, &sinfo) < 0) {
3682                 nlmsg_free(msg);
3683                 return -ENOBUFS;
3684         }
3685
3686         return genlmsg_reply(msg, info);
3687 }
3688
3689 int cfg80211_check_station_change(struct wiphy *wiphy,
3690                                   struct station_parameters *params,
3691                                   enum cfg80211_station_type statype)
3692 {
3693         if (params->listen_interval != -1)
3694                 return -EINVAL;
3695         if (params->aid)
3696                 return -EINVAL;
3697
3698         /* When you run into this, adjust the code below for the new flag */
3699         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3700
3701         switch (statype) {
3702         case CFG80211_STA_MESH_PEER_KERNEL:
3703         case CFG80211_STA_MESH_PEER_USER:
3704                 /*
3705                  * No ignoring the TDLS flag here -- the userspace mesh
3706                  * code doesn't have the bug of including TDLS in the
3707                  * mask everywhere.
3708                  */
3709                 if (params->sta_flags_mask &
3710                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3711                                   BIT(NL80211_STA_FLAG_MFP) |
3712                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3713                         return -EINVAL;
3714                 break;
3715         case CFG80211_STA_TDLS_PEER_SETUP:
3716         case CFG80211_STA_TDLS_PEER_ACTIVE:
3717                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3718                         return -EINVAL;
3719                 /* ignore since it can't change */
3720                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3721                 break;
3722         default:
3723                 /* disallow mesh-specific things */
3724                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3725                         return -EINVAL;
3726                 if (params->local_pm)
3727                         return -EINVAL;
3728                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3729                         return -EINVAL;
3730         }
3731
3732         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3733             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3734                 /* TDLS can't be set, ... */
3735                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3736                         return -EINVAL;
3737                 /*
3738                  * ... but don't bother the driver with it. This works around
3739                  * a hostapd/wpa_supplicant issue -- it always includes the
3740                  * TLDS_PEER flag in the mask even for AP mode.
3741                  */
3742                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3743         }
3744
3745         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3746                 /* reject other things that can't change */
3747                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3748                         return -EINVAL;
3749                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3750                         return -EINVAL;
3751                 if (params->supported_rates)
3752                         return -EINVAL;
3753                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3754                         return -EINVAL;
3755         }
3756
3757         if (statype != CFG80211_STA_AP_CLIENT) {
3758                 if (params->vlan)
3759                         return -EINVAL;
3760         }
3761
3762         switch (statype) {
3763         case CFG80211_STA_AP_MLME_CLIENT:
3764                 /* Use this only for authorizing/unauthorizing a station */
3765                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3766                         return -EOPNOTSUPP;
3767                 break;
3768         case CFG80211_STA_AP_CLIENT:
3769                 /* accept only the listed bits */
3770                 if (params->sta_flags_mask &
3771                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3772                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3773                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3774                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3775                                   BIT(NL80211_STA_FLAG_WME) |
3776                                   BIT(NL80211_STA_FLAG_MFP)))
3777                         return -EINVAL;
3778
3779                 /* but authenticated/associated only if driver handles it */
3780                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3781                     params->sta_flags_mask &
3782                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3783                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3784                         return -EINVAL;
3785                 break;
3786         case CFG80211_STA_IBSS:
3787         case CFG80211_STA_AP_STA:
3788                 /* reject any changes other than AUTHORIZED */
3789                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3790                         return -EINVAL;
3791                 break;
3792         case CFG80211_STA_TDLS_PEER_SETUP:
3793                 /* reject any changes other than AUTHORIZED or WME */
3794                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3795                                                BIT(NL80211_STA_FLAG_WME)))
3796                         return -EINVAL;
3797                 /* force (at least) rates when authorizing */
3798                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3799                     !params->supported_rates)
3800                         return -EINVAL;
3801                 break;
3802         case CFG80211_STA_TDLS_PEER_ACTIVE:
3803                 /* reject any changes */
3804                 return -EINVAL;
3805         case CFG80211_STA_MESH_PEER_KERNEL:
3806                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3807                         return -EINVAL;
3808                 break;
3809         case CFG80211_STA_MESH_PEER_USER:
3810                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3811                         return -EINVAL;
3812                 break;
3813         }
3814
3815         return 0;
3816 }
3817 EXPORT_SYMBOL(cfg80211_check_station_change);
3818
3819 /*
3820  * Get vlan interface making sure it is running and on the right wiphy.
3821  */
3822 static struct net_device *get_vlan(struct genl_info *info,
3823                                    struct cfg80211_registered_device *rdev)
3824 {
3825         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3826         struct net_device *v;
3827         int ret;
3828
3829         if (!vlanattr)
3830                 return NULL;
3831
3832         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3833         if (!v)
3834                 return ERR_PTR(-ENODEV);
3835
3836         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3837                 ret = -EINVAL;
3838                 goto error;
3839         }
3840
3841         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3842             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3843             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3844                 ret = -EINVAL;
3845                 goto error;
3846         }
3847
3848         if (!netif_running(v)) {
3849                 ret = -ENETDOWN;
3850                 goto error;
3851         }
3852
3853         return v;
3854  error:
3855         dev_put(v);
3856         return ERR_PTR(ret);
3857 }
3858
3859 static struct nla_policy
3860 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3861         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3862         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3863 };
3864
3865 static int nl80211_parse_sta_wme(struct genl_info *info,
3866                                  struct station_parameters *params)
3867 {
3868         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3869         struct nlattr *nla;
3870         int err;
3871
3872         /* parse WME attributes if present */
3873         if (!info->attrs[NL80211_ATTR_STA_WME])
3874                 return 0;
3875
3876         nla = info->attrs[NL80211_ATTR_STA_WME];
3877         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3878                                nl80211_sta_wme_policy);
3879         if (err)
3880                 return err;
3881
3882         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3883                 params->uapsd_queues = nla_get_u8(
3884                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3885         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3886                 return -EINVAL;
3887
3888         if (tb[NL80211_STA_WME_MAX_SP])
3889                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3890
3891         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3892                 return -EINVAL;
3893
3894         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3895
3896         return 0;
3897 }
3898
3899 static int nl80211_set_station_tdls(struct genl_info *info,
3900                                     struct station_parameters *params)
3901 {
3902         /* Dummy STA entry gets updated once the peer capabilities are known */
3903         if (info->attrs[NL80211_ATTR_PEER_AID])
3904                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3905         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3906                 params->ht_capa =
3907                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3908         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3909                 params->vht_capa =
3910                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3911
3912         return nl80211_parse_sta_wme(info, params);
3913 }
3914
3915 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3916 {
3917         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3918         struct net_device *dev = info->user_ptr[1];
3919         struct station_parameters params;
3920         u8 *mac_addr;
3921         int err;
3922
3923         memset(&params, 0, sizeof(params));
3924
3925         params.listen_interval = -1;
3926
3927         if (!rdev->ops->change_station)
3928                 return -EOPNOTSUPP;
3929
3930         if (info->attrs[NL80211_ATTR_STA_AID])
3931                 return -EINVAL;
3932
3933         if (!info->attrs[NL80211_ATTR_MAC])
3934                 return -EINVAL;
3935
3936         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3937
3938         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3939                 params.supported_rates =
3940                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3941                 params.supported_rates_len =
3942                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3943         }
3944
3945         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3946                 params.capability =
3947                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3948                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3949         }
3950
3951         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3952                 params.ext_capab =
3953                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3954                 params.ext_capab_len =
3955                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3956         }
3957
3958         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3959                 return -EINVAL;
3960
3961         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3962                 return -EINVAL;
3963
3964         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3965                 params.plink_action =
3966                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3967                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3968                         return -EINVAL;
3969         }
3970
3971         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3972                 params.plink_state =
3973                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3974                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3975                         return -EINVAL;
3976                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3977         }
3978
3979         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3980                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3981                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3982
3983                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3984                     pm > NL80211_MESH_POWER_MAX)
3985                         return -EINVAL;
3986
3987                 params.local_pm = pm;
3988         }
3989
3990         /* Include parameters for TDLS peer (will check later) */
3991         err = nl80211_set_station_tdls(info, &params);
3992         if (err)
3993                 return err;
3994
3995         params.vlan = get_vlan(info, rdev);
3996         if (IS_ERR(params.vlan))
3997                 return PTR_ERR(params.vlan);
3998
3999         switch (dev->ieee80211_ptr->iftype) {
4000         case NL80211_IFTYPE_AP:
4001         case NL80211_IFTYPE_AP_VLAN:
4002         case NL80211_IFTYPE_P2P_GO:
4003         case NL80211_IFTYPE_P2P_CLIENT:
4004         case NL80211_IFTYPE_STATION:
4005         case NL80211_IFTYPE_ADHOC:
4006         case NL80211_IFTYPE_MESH_POINT:
4007                 break;
4008         default:
4009                 err = -EOPNOTSUPP;
4010                 goto out_put_vlan;
4011         }
4012
4013         /* driver will call cfg80211_check_station_change() */
4014         err = rdev_change_station(rdev, dev, mac_addr, &params);
4015
4016  out_put_vlan:
4017         if (params.vlan)
4018                 dev_put(params.vlan);
4019
4020         return err;
4021 }
4022
4023 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4024 {
4025         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4026         int err;
4027         struct net_device *dev = info->user_ptr[1];
4028         struct station_parameters params;
4029         u8 *mac_addr = NULL;
4030
4031         memset(&params, 0, sizeof(params));
4032
4033         if (!rdev->ops->add_station)
4034                 return -EOPNOTSUPP;
4035
4036         if (!info->attrs[NL80211_ATTR_MAC])
4037                 return -EINVAL;
4038
4039         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4040                 return -EINVAL;
4041
4042         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4043                 return -EINVAL;
4044
4045         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4046             !info->attrs[NL80211_ATTR_PEER_AID])
4047                 return -EINVAL;
4048
4049         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4050         params.supported_rates =
4051                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4052         params.supported_rates_len =
4053                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4054         params.listen_interval =
4055                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4056
4057         if (info->attrs[NL80211_ATTR_PEER_AID])
4058                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4059         else
4060                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4061         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4062                 return -EINVAL;
4063
4064         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4065                 params.capability =
4066                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4067                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4068         }
4069
4070         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4071                 params.ext_capab =
4072                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4073                 params.ext_capab_len =
4074                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4075         }
4076
4077         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4078                 params.ht_capa =
4079                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4080
4081         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4082                 params.vht_capa =
4083                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4084
4085         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4086                 params.plink_action =
4087                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4088                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4089                         return -EINVAL;
4090         }
4091
4092         err = nl80211_parse_sta_wme(info, &params);
4093         if (err)
4094                 return err;
4095
4096         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4097                 return -EINVAL;
4098
4099         /* When you run into this, adjust the code below for the new flag */
4100         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4101
4102         switch (dev->ieee80211_ptr->iftype) {
4103         case NL80211_IFTYPE_AP:
4104         case NL80211_IFTYPE_AP_VLAN:
4105         case NL80211_IFTYPE_P2P_GO:
4106                 /* ignore WME attributes if iface/sta is not capable */
4107                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4108                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4109                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4110
4111                 /* TDLS peers cannot be added */
4112                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4113                     info->attrs[NL80211_ATTR_PEER_AID])
4114                         return -EINVAL;
4115                 /* but don't bother the driver with it */
4116                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4117
4118                 /* allow authenticated/associated only if driver handles it */
4119                 if (!(rdev->wiphy.features &
4120                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4121                     params.sta_flags_mask &
4122                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4123                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4124                         return -EINVAL;
4125
4126                 /* must be last in here for error handling */
4127                 params.vlan = get_vlan(info, rdev);
4128                 if (IS_ERR(params.vlan))
4129                         return PTR_ERR(params.vlan);
4130                 break;
4131         case NL80211_IFTYPE_MESH_POINT:
4132                 /* ignore uAPSD data */
4133                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4134
4135                 /* associated is disallowed */
4136                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4137                         return -EINVAL;
4138                 /* TDLS peers cannot be added */
4139                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4140                     info->attrs[NL80211_ATTR_PEER_AID])
4141                         return -EINVAL;
4142                 break;
4143         case NL80211_IFTYPE_STATION:
4144         case NL80211_IFTYPE_P2P_CLIENT:
4145                 /* ignore uAPSD data */
4146                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4147
4148                 /* these are disallowed */
4149                 if (params.sta_flags_mask &
4150                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4151                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4152                         return -EINVAL;
4153                 /* Only TDLS peers can be added */
4154                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4155                         return -EINVAL;
4156                 /* Can only add if TDLS ... */
4157                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4158                         return -EOPNOTSUPP;
4159                 /* ... with external setup is supported */
4160                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4161                         return -EOPNOTSUPP;
4162                 /*
4163                  * Older wpa_supplicant versions always mark the TDLS peer
4164                  * as authorized, but it shouldn't yet be.
4165                  */
4166                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4167                 break;
4168         default:
4169                 return -EOPNOTSUPP;
4170         }
4171
4172         /* be aware of params.vlan when changing code here */
4173
4174         err = rdev_add_station(rdev, dev, mac_addr, &params);
4175
4176         if (params.vlan)
4177                 dev_put(params.vlan);
4178         return err;
4179 }
4180
4181 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4182 {
4183         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4184         struct net_device *dev = info->user_ptr[1];
4185         u8 *mac_addr = NULL;
4186
4187         if (info->attrs[NL80211_ATTR_MAC])
4188                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4189
4190         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4191             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4192             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4193             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4194                 return -EINVAL;
4195
4196         if (!rdev->ops->del_station)
4197                 return -EOPNOTSUPP;
4198
4199         return rdev_del_station(rdev, dev, mac_addr);
4200 }
4201
4202 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4203                                 int flags, struct net_device *dev,
4204                                 u8 *dst, u8 *next_hop,
4205                                 struct mpath_info *pinfo)
4206 {
4207         void *hdr;
4208         struct nlattr *pinfoattr;
4209
4210         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4211         if (!hdr)
4212                 return -1;
4213
4214         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4215             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4216             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4217             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4218                 goto nla_put_failure;
4219
4220         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4221         if (!pinfoattr)
4222                 goto nla_put_failure;
4223         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4224             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4225                         pinfo->frame_qlen))
4226                 goto nla_put_failure;
4227         if (((pinfo->filled & MPATH_INFO_SN) &&
4228              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4229             ((pinfo->filled & MPATH_INFO_METRIC) &&
4230              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4231                          pinfo->metric)) ||
4232             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4233              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4234                          pinfo->exptime)) ||
4235             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4236              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4237                         pinfo->flags)) ||
4238             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4239              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4240                          pinfo->discovery_timeout)) ||
4241             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4242              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4243                         pinfo->discovery_retries)))
4244                 goto nla_put_failure;
4245
4246         nla_nest_end(msg, pinfoattr);
4247
4248         return genlmsg_end(msg, hdr);
4249
4250  nla_put_failure:
4251         genlmsg_cancel(msg, hdr);
4252         return -EMSGSIZE;
4253 }
4254
4255 static int nl80211_dump_mpath(struct sk_buff *skb,
4256                               struct netlink_callback *cb)
4257 {
4258         struct mpath_info pinfo;
4259         struct cfg80211_registered_device *dev;
4260         struct wireless_dev *wdev;
4261         u8 dst[ETH_ALEN];
4262         u8 next_hop[ETH_ALEN];
4263         int path_idx = cb->args[2];
4264         int err;
4265
4266         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4267         if (err)
4268                 return err;
4269
4270         if (!dev->ops->dump_mpath) {
4271                 err = -EOPNOTSUPP;
4272                 goto out_err;
4273         }
4274
4275         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4276                 err = -EOPNOTSUPP;
4277                 goto out_err;
4278         }
4279
4280         while (1) {
4281                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4282                                       next_hop, &pinfo);
4283                 if (err == -ENOENT)
4284                         break;
4285                 if (err)
4286                         goto out_err;
4287
4288                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4289                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4290                                        wdev->netdev, dst, next_hop,
4291                                        &pinfo) < 0)
4292                         goto out;
4293
4294                 path_idx++;
4295         }
4296
4297
4298  out:
4299         cb->args[2] = path_idx;
4300         err = skb->len;
4301  out_err:
4302         nl80211_finish_wdev_dump(dev);
4303         return err;
4304 }
4305
4306 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4307 {
4308         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4309         int err;
4310         struct net_device *dev = info->user_ptr[1];
4311         struct mpath_info pinfo;
4312         struct sk_buff *msg;
4313         u8 *dst = NULL;
4314         u8 next_hop[ETH_ALEN];
4315
4316         memset(&pinfo, 0, sizeof(pinfo));
4317
4318         if (!info->attrs[NL80211_ATTR_MAC])
4319                 return -EINVAL;
4320
4321         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4322
4323         if (!rdev->ops->get_mpath)
4324                 return -EOPNOTSUPP;
4325
4326         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4327                 return -EOPNOTSUPP;
4328
4329         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4330         if (err)
4331                 return err;
4332
4333         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4334         if (!msg)
4335                 return -ENOMEM;
4336
4337         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4338                                  dev, dst, next_hop, &pinfo) < 0) {
4339                 nlmsg_free(msg);
4340                 return -ENOBUFS;
4341         }
4342
4343         return genlmsg_reply(msg, info);
4344 }
4345
4346 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4347 {
4348         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4349         struct net_device *dev = info->user_ptr[1];
4350         u8 *dst = NULL;
4351         u8 *next_hop = NULL;
4352
4353         if (!info->attrs[NL80211_ATTR_MAC])
4354                 return -EINVAL;
4355
4356         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4357                 return -EINVAL;
4358
4359         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4360         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4361
4362         if (!rdev->ops->change_mpath)
4363                 return -EOPNOTSUPP;
4364
4365         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4366                 return -EOPNOTSUPP;
4367
4368         return rdev_change_mpath(rdev, dev, dst, next_hop);
4369 }
4370
4371 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4372 {
4373         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4374         struct net_device *dev = info->user_ptr[1];
4375         u8 *dst = NULL;
4376         u8 *next_hop = NULL;
4377
4378         if (!info->attrs[NL80211_ATTR_MAC])
4379                 return -EINVAL;
4380
4381         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4382                 return -EINVAL;
4383
4384         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4385         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4386
4387         if (!rdev->ops->add_mpath)
4388                 return -EOPNOTSUPP;
4389
4390         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4391                 return -EOPNOTSUPP;
4392
4393         return rdev_add_mpath(rdev, dev, dst, next_hop);
4394 }
4395
4396 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4397 {
4398         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4399         struct net_device *dev = info->user_ptr[1];
4400         u8 *dst = NULL;
4401
4402         if (info->attrs[NL80211_ATTR_MAC])
4403                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4404
4405         if (!rdev->ops->del_mpath)
4406                 return -EOPNOTSUPP;
4407
4408         return rdev_del_mpath(rdev, dev, dst);
4409 }
4410
4411 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4412 {
4413         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4414         struct net_device *dev = info->user_ptr[1];
4415         struct bss_parameters params;
4416
4417         memset(&params, 0, sizeof(params));
4418         /* default to not changing parameters */
4419         params.use_cts_prot = -1;
4420         params.use_short_preamble = -1;
4421         params.use_short_slot_time = -1;
4422         params.ap_isolate = -1;
4423         params.ht_opmode = -1;
4424         params.p2p_ctwindow = -1;
4425         params.p2p_opp_ps = -1;
4426
4427         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4428                 params.use_cts_prot =
4429                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4430         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4431                 params.use_short_preamble =
4432                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4433         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4434                 params.use_short_slot_time =
4435                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4436         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4437                 params.basic_rates =
4438                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4439                 params.basic_rates_len =
4440                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4441         }
4442         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4443                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4444         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4445                 params.ht_opmode =
4446                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4447
4448         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4449                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4450                         return -EINVAL;
4451                 params.p2p_ctwindow =
4452                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4453                 if (params.p2p_ctwindow < 0)
4454                         return -EINVAL;
4455                 if (params.p2p_ctwindow != 0 &&
4456                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4457                         return -EINVAL;
4458         }
4459
4460         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4461                 u8 tmp;
4462
4463                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4464                         return -EINVAL;
4465                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4466                 if (tmp > 1)
4467                         return -EINVAL;
4468                 params.p2p_opp_ps = tmp;
4469                 if (params.p2p_opp_ps &&
4470                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4471                         return -EINVAL;
4472         }
4473
4474         if (!rdev->ops->change_bss)
4475                 return -EOPNOTSUPP;
4476
4477         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4478             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4479                 return -EOPNOTSUPP;
4480
4481         return rdev_change_bss(rdev, dev, &params);
4482 }
4483
4484 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4485         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4486         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4487         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4488         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4489         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4490         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4491 };
4492
4493 static int parse_reg_rule(struct nlattr *tb[],
4494         struct ieee80211_reg_rule *reg_rule)
4495 {
4496         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4497         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4498
4499         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4500                 return -EINVAL;
4501         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4502                 return -EINVAL;
4503         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4504                 return -EINVAL;
4505         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4506                 return -EINVAL;
4507         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4508                 return -EINVAL;
4509
4510         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4511
4512         freq_range->start_freq_khz =
4513                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4514         freq_range->end_freq_khz =
4515                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4516         freq_range->max_bandwidth_khz =
4517                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4518
4519         power_rule->max_eirp =
4520                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4521
4522         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4523                 power_rule->max_antenna_gain =
4524                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4525
4526         return 0;
4527 }
4528
4529 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4530 {
4531         int r;
4532         char *data = NULL;
4533         enum nl80211_user_reg_hint_type user_reg_hint_type;
4534
4535         /*
4536          * You should only get this when cfg80211 hasn't yet initialized
4537          * completely when built-in to the kernel right between the time
4538          * window between nl80211_init() and regulatory_init(), if that is
4539          * even possible.
4540          */
4541         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4542                 return -EINPROGRESS;
4543
4544         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4545                 return -EINVAL;
4546
4547         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4548
4549         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4550                 user_reg_hint_type =
4551                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4552         else
4553                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4554
4555         switch (user_reg_hint_type) {
4556         case NL80211_USER_REG_HINT_USER:
4557         case NL80211_USER_REG_HINT_CELL_BASE:
4558                 break;
4559         default:
4560                 return -EINVAL;
4561         }
4562
4563         r = regulatory_hint_user(data, user_reg_hint_type);
4564
4565         return r;
4566 }
4567
4568 static int nl80211_get_mesh_config(struct sk_buff *skb,
4569                                    struct genl_info *info)
4570 {
4571         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4572         struct net_device *dev = info->user_ptr[1];
4573         struct wireless_dev *wdev = dev->ieee80211_ptr;
4574         struct mesh_config cur_params;
4575         int err = 0;
4576         void *hdr;
4577         struct nlattr *pinfoattr;
4578         struct sk_buff *msg;
4579
4580         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4581                 return -EOPNOTSUPP;
4582
4583         if (!rdev->ops->get_mesh_config)
4584                 return -EOPNOTSUPP;
4585
4586         wdev_lock(wdev);
4587         /* If not connected, get default parameters */
4588         if (!wdev->mesh_id_len)
4589                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4590         else
4591                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4592         wdev_unlock(wdev);
4593
4594         if (err)
4595                 return err;
4596
4597         /* Draw up a netlink message to send back */
4598         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4599         if (!msg)
4600                 return -ENOMEM;
4601         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4602                              NL80211_CMD_GET_MESH_CONFIG);
4603         if (!hdr)
4604                 goto out;
4605         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4606         if (!pinfoattr)
4607                 goto nla_put_failure;
4608         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4609             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4610                         cur_params.dot11MeshRetryTimeout) ||
4611             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4612                         cur_params.dot11MeshConfirmTimeout) ||
4613             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4614                         cur_params.dot11MeshHoldingTimeout) ||
4615             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4616                         cur_params.dot11MeshMaxPeerLinks) ||
4617             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4618                        cur_params.dot11MeshMaxRetries) ||
4619             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4620                        cur_params.dot11MeshTTL) ||
4621             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4622                        cur_params.element_ttl) ||
4623             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4624                        cur_params.auto_open_plinks) ||
4625             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4626                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4627             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4628                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4629             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4630                         cur_params.path_refresh_time) ||
4631             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4632                         cur_params.min_discovery_timeout) ||
4633             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4634                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4635             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4636                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4637             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4638                         cur_params.dot11MeshHWMPperrMinInterval) ||
4639             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4640                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4641             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4642                        cur_params.dot11MeshHWMPRootMode) ||
4643             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4644                         cur_params.dot11MeshHWMPRannInterval) ||
4645             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4646                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4647             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4648                        cur_params.dot11MeshForwarding) ||
4649             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4650                         cur_params.rssi_threshold) ||
4651             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4652                         cur_params.ht_opmode) ||
4653             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4654                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4655             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4656                         cur_params.dot11MeshHWMProotInterval) ||
4657             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4658                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4659             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4660                         cur_params.power_mode) ||
4661             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4662                         cur_params.dot11MeshAwakeWindowDuration) ||
4663             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4664                         cur_params.plink_timeout))
4665                 goto nla_put_failure;
4666         nla_nest_end(msg, pinfoattr);
4667         genlmsg_end(msg, hdr);
4668         return genlmsg_reply(msg, info);
4669
4670  nla_put_failure:
4671         genlmsg_cancel(msg, hdr);
4672  out:
4673         nlmsg_free(msg);
4674         return -ENOBUFS;
4675 }
4676
4677 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4678         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4679         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4680         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4681         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4682         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4683         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4684         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4685         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4686         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4687         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4688         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4689         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4690         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4691         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4692         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4693         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4694         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4695         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4696         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4697         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4698         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4699         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4700         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4701         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4702         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4703         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4704         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4705         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4706 };
4707
4708 static const struct nla_policy
4709         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4710         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4711         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4712         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4713         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4714         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4715         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4716         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4717                                     .len = IEEE80211_MAX_DATA_LEN },
4718         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4719 };
4720
4721 static int nl80211_parse_mesh_config(struct genl_info *info,
4722                                      struct mesh_config *cfg,
4723                                      u32 *mask_out)
4724 {
4725         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4726         u32 mask = 0;
4727
4728 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4729 do {                                                                        \
4730         if (tb[attr]) {                                                     \
4731                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4732                         return -EINVAL;                                     \
4733                 cfg->param = fn(tb[attr]);                                  \
4734                 mask |= (1 << (attr - 1));                                  \
4735         }                                                                   \
4736 } while (0)
4737
4738
4739         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4740                 return -EINVAL;
4741         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4742                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4743                              nl80211_meshconf_params_policy))
4744                 return -EINVAL;
4745
4746         /* This makes sure that there aren't more than 32 mesh config
4747          * parameters (otherwise our bitfield scheme would not work.) */
4748         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4749
4750         /* Fill in the params struct */
4751         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4752                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4753                                   nla_get_u16);
4754         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4755                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4756                                   nla_get_u16);
4757         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4758                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4759                                   nla_get_u16);
4760         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4761                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4762                                   nla_get_u16);
4763         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4764                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4765                                   nla_get_u8);
4766         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4767                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4768         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4769                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4770                                   nla_get_u8);
4771         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4772                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4773                                   nla_get_u8);
4774         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4775                                   1, 255, mask,
4776                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4777                                   nla_get_u32);
4778         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4779                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4780                                   nla_get_u8);
4781         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4782                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4783                                   nla_get_u32);
4784         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4785                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4786                                   nla_get_u16);
4787         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4788                                   1, 65535, mask,
4789                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4790                                   nla_get_u32);
4791         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4792                                   1, 65535, mask,
4793                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4794                                   nla_get_u16);
4795         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4796                                   1, 65535, mask,
4797                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4798                                   nla_get_u16);
4799         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4800                                   dot11MeshHWMPnetDiameterTraversalTime,
4801                                   1, 65535, mask,
4802                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4803                                   nla_get_u16);
4804         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4805                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4806                                   nla_get_u8);
4807         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4808                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4809                                   nla_get_u16);
4810         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4811                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4812                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4813                                   nla_get_u8);
4814         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4815                                   mask, NL80211_MESHCONF_FORWARDING,
4816                                   nla_get_u8);
4817         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4818                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4819                                   nla_get_s32);
4820         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4821                                   mask, NL80211_MESHCONF_HT_OPMODE,
4822                                   nla_get_u16);
4823         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4824                                   1, 65535, mask,
4825                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4826                                   nla_get_u32);
4827         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4828                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4829                                   nla_get_u16);
4830         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4831                                   dot11MeshHWMPconfirmationInterval,
4832                                   1, 65535, mask,
4833                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4834                                   nla_get_u16);
4835         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4836                                   NL80211_MESH_POWER_ACTIVE,
4837                                   NL80211_MESH_POWER_MAX,
4838                                   mask, NL80211_MESHCONF_POWER_MODE,
4839                                   nla_get_u32);
4840         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4841                                   0, 65535, mask,
4842                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4843         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4844                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4845                                   nla_get_u32);
4846         if (mask_out)
4847                 *mask_out = mask;
4848
4849         return 0;
4850
4851 #undef FILL_IN_MESH_PARAM_IF_SET
4852 }
4853
4854 static int nl80211_parse_mesh_setup(struct genl_info *info,
4855                                      struct mesh_setup *setup)
4856 {
4857         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4858         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4859
4860         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4861                 return -EINVAL;
4862         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4863                              info->attrs[NL80211_ATTR_MESH_SETUP],
4864                              nl80211_mesh_setup_params_policy))
4865                 return -EINVAL;
4866
4867         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4868                 setup->sync_method =
4869                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4870                  IEEE80211_SYNC_METHOD_VENDOR :
4871                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4872
4873         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4874                 setup->path_sel_proto =
4875                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4876                  IEEE80211_PATH_PROTOCOL_VENDOR :
4877                  IEEE80211_PATH_PROTOCOL_HWMP;
4878
4879         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4880                 setup->path_metric =
4881                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4882                  IEEE80211_PATH_METRIC_VENDOR :
4883                  IEEE80211_PATH_METRIC_AIRTIME;
4884
4885
4886         if (tb[NL80211_MESH_SETUP_IE]) {
4887                 struct nlattr *ieattr =
4888                         tb[NL80211_MESH_SETUP_IE];
4889                 if (!is_valid_ie_attr(ieattr))
4890                         return -EINVAL;
4891                 setup->ie = nla_data(ieattr);
4892                 setup->ie_len = nla_len(ieattr);
4893         }
4894         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4895             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4896                 return -EINVAL;
4897         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4898         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4899         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4900         if (setup->is_secure)
4901                 setup->user_mpm = true;
4902
4903         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
4904                 if (!setup->user_mpm)
4905                         return -EINVAL;
4906                 setup->auth_id =
4907                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
4908         }
4909
4910         return 0;
4911 }
4912
4913 static int nl80211_update_mesh_config(struct sk_buff *skb,
4914                                       struct genl_info *info)
4915 {
4916         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4917         struct net_device *dev = info->user_ptr[1];
4918         struct wireless_dev *wdev = dev->ieee80211_ptr;
4919         struct mesh_config cfg;
4920         u32 mask;
4921         int err;
4922
4923         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4924                 return -EOPNOTSUPP;
4925
4926         if (!rdev->ops->update_mesh_config)
4927                 return -EOPNOTSUPP;
4928
4929         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4930         if (err)
4931                 return err;
4932
4933         wdev_lock(wdev);
4934         if (!wdev->mesh_id_len)
4935                 err = -ENOLINK;
4936
4937         if (!err)
4938                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4939
4940         wdev_unlock(wdev);
4941
4942         return err;
4943 }
4944
4945 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4946 {
4947         const struct ieee80211_regdomain *regdom;
4948         struct sk_buff *msg;
4949         void *hdr = NULL;
4950         struct nlattr *nl_reg_rules;
4951         unsigned int i;
4952
4953         if (!cfg80211_regdomain)
4954                 return -EINVAL;
4955
4956         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4957         if (!msg)
4958                 return -ENOBUFS;
4959
4960         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4961                              NL80211_CMD_GET_REG);
4962         if (!hdr)
4963                 goto put_failure;
4964
4965         if (reg_last_request_cell_base() &&
4966             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4967                         NL80211_USER_REG_HINT_CELL_BASE))
4968                 goto nla_put_failure;
4969
4970         rcu_read_lock();
4971         regdom = rcu_dereference(cfg80211_regdomain);
4972
4973         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4974             (regdom->dfs_region &&
4975              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4976                 goto nla_put_failure_rcu;
4977
4978         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4979         if (!nl_reg_rules)
4980                 goto nla_put_failure_rcu;
4981
4982         for (i = 0; i < regdom->n_reg_rules; i++) {
4983                 struct nlattr *nl_reg_rule;
4984                 const struct ieee80211_reg_rule *reg_rule;
4985                 const struct ieee80211_freq_range *freq_range;
4986                 const struct ieee80211_power_rule *power_rule;
4987
4988                 reg_rule = &regdom->reg_rules[i];
4989                 freq_range = &reg_rule->freq_range;
4990                 power_rule = &reg_rule->power_rule;
4991
4992                 nl_reg_rule = nla_nest_start(msg, i);
4993                 if (!nl_reg_rule)
4994                         goto nla_put_failure_rcu;
4995
4996                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4997                                 reg_rule->flags) ||
4998                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4999                                 freq_range->start_freq_khz) ||
5000                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5001                                 freq_range->end_freq_khz) ||
5002                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5003                                 freq_range->max_bandwidth_khz) ||
5004                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5005                                 power_rule->max_antenna_gain) ||
5006                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5007                                 power_rule->max_eirp))
5008                         goto nla_put_failure_rcu;
5009
5010                 nla_nest_end(msg, nl_reg_rule);
5011         }
5012         rcu_read_unlock();
5013
5014         nla_nest_end(msg, nl_reg_rules);
5015
5016         genlmsg_end(msg, hdr);
5017         return genlmsg_reply(msg, info);
5018
5019 nla_put_failure_rcu:
5020         rcu_read_unlock();
5021 nla_put_failure:
5022         genlmsg_cancel(msg, hdr);
5023 put_failure:
5024         nlmsg_free(msg);
5025         return -EMSGSIZE;
5026 }
5027
5028 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5029 {
5030         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5031         struct nlattr *nl_reg_rule;
5032         char *alpha2 = NULL;
5033         int rem_reg_rules = 0, r = 0;
5034         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5035         u8 dfs_region = 0;
5036         struct ieee80211_regdomain *rd = NULL;
5037
5038         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5039                 return -EINVAL;
5040
5041         if (!info->attrs[NL80211_ATTR_REG_RULES])
5042                 return -EINVAL;
5043
5044         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5045
5046         if (info->attrs[NL80211_ATTR_DFS_REGION])
5047                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5048
5049         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5050                             rem_reg_rules) {
5051                 num_rules++;
5052                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5053                         return -EINVAL;
5054         }
5055
5056         size_of_regd = sizeof(struct ieee80211_regdomain) +
5057                        num_rules * sizeof(struct ieee80211_reg_rule);
5058
5059         rd = kzalloc(size_of_regd, GFP_KERNEL);
5060         if (!rd)
5061                 return -ENOMEM;
5062
5063         rd->n_reg_rules = num_rules;
5064         rd->alpha2[0] = alpha2[0];
5065         rd->alpha2[1] = alpha2[1];
5066
5067         /*
5068          * Disable DFS master mode if the DFS region was
5069          * not supported or known on this kernel.
5070          */
5071         if (reg_supported_dfs_region(dfs_region))
5072                 rd->dfs_region = dfs_region;
5073
5074         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5075                             rem_reg_rules) {
5076                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5077                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5078                           reg_rule_policy);
5079                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5080                 if (r)
5081                         goto bad_reg;
5082
5083                 rule_idx++;
5084
5085                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5086                         r = -EINVAL;
5087                         goto bad_reg;
5088                 }
5089         }
5090
5091         r = set_regdom(rd);
5092         /* set_regdom took ownership */
5093         rd = NULL;
5094
5095  bad_reg:
5096         kfree(rd);
5097         return r;
5098 }
5099
5100 static int validate_scan_freqs(struct nlattr *freqs)
5101 {
5102         struct nlattr *attr1, *attr2;
5103         int n_channels = 0, tmp1, tmp2;
5104
5105         nla_for_each_nested(attr1, freqs, tmp1) {
5106                 n_channels++;
5107                 /*
5108                  * Some hardware has a limited channel list for
5109                  * scanning, and it is pretty much nonsensical
5110                  * to scan for a channel twice, so disallow that
5111                  * and don't require drivers to check that the
5112                  * channel list they get isn't longer than what
5113                  * they can scan, as long as they can scan all
5114                  * the channels they registered at once.
5115                  */
5116                 nla_for_each_nested(attr2, freqs, tmp2)
5117                         if (attr1 != attr2 &&
5118                             nla_get_u32(attr1) == nla_get_u32(attr2))
5119                                 return 0;
5120         }
5121
5122         return n_channels;
5123 }
5124
5125 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5126 {
5127         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5128         struct wireless_dev *wdev = info->user_ptr[1];
5129         struct cfg80211_scan_request *request;
5130         struct nlattr *attr;
5131         struct wiphy *wiphy;
5132         int err, tmp, n_ssids = 0, n_channels, i;
5133         size_t ie_len;
5134
5135         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5136                 return -EINVAL;
5137
5138         wiphy = &rdev->wiphy;
5139
5140         if (!rdev->ops->scan)
5141                 return -EOPNOTSUPP;
5142
5143         if (rdev->scan_req) {
5144                 err = -EBUSY;
5145                 goto unlock;
5146         }
5147
5148         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5149                 n_channels = validate_scan_freqs(
5150                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5151                 if (!n_channels) {
5152                         err = -EINVAL;
5153                         goto unlock;
5154                 }
5155         } else {
5156                 enum ieee80211_band band;
5157                 n_channels = 0;
5158
5159                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5160                         if (wiphy->bands[band])
5161                                 n_channels += wiphy->bands[band]->n_channels;
5162         }
5163
5164         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5165                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5166                         n_ssids++;
5167
5168         if (n_ssids > wiphy->max_scan_ssids) {
5169                 err = -EINVAL;
5170                 goto unlock;
5171         }
5172
5173         if (info->attrs[NL80211_ATTR_IE])
5174                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5175         else
5176                 ie_len = 0;
5177
5178         if (ie_len > wiphy->max_scan_ie_len) {
5179                 err = -EINVAL;
5180                 goto unlock;
5181         }
5182
5183         request = kzalloc(sizeof(*request)
5184                         + sizeof(*request->ssids) * n_ssids
5185                         + sizeof(*request->channels) * n_channels
5186                         + ie_len, GFP_KERNEL);
5187         if (!request) {
5188                 err = -ENOMEM;
5189                 goto unlock;
5190         }
5191
5192         if (n_ssids)
5193                 request->ssids = (void *)&request->channels[n_channels];
5194         request->n_ssids = n_ssids;
5195         if (ie_len) {
5196                 if (request->ssids)
5197                         request->ie = (void *)(request->ssids + n_ssids);
5198                 else
5199                         request->ie = (void *)(request->channels + n_channels);
5200         }
5201
5202         i = 0;
5203         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5204                 /* user specified, bail out if channel not found */
5205                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5206                         struct ieee80211_channel *chan;
5207
5208                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5209
5210                         if (!chan) {
5211                                 err = -EINVAL;
5212                                 goto out_free;
5213                         }
5214
5215                         /* ignore disabled channels */
5216                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5217                                 continue;
5218
5219                         request->channels[i] = chan;
5220                         i++;
5221                 }
5222         } else {
5223                 enum ieee80211_band band;
5224
5225                 /* all channels */
5226                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5227                         int j;
5228                         if (!wiphy->bands[band])
5229                                 continue;
5230                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5231                                 struct ieee80211_channel *chan;
5232
5233                                 chan = &wiphy->bands[band]->channels[j];
5234
5235                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5236                                         continue;
5237
5238                                 request->channels[i] = chan;
5239                                 i++;
5240                         }
5241                 }
5242         }
5243
5244         if (!i) {
5245                 err = -EINVAL;
5246                 goto out_free;
5247         }
5248
5249         request->n_channels = i;
5250
5251         i = 0;
5252         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5253                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5254                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5255                                 err = -EINVAL;
5256                                 goto out_free;
5257                         }
5258                         request->ssids[i].ssid_len = nla_len(attr);
5259                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5260                         i++;
5261                 }
5262         }
5263
5264         if (info->attrs[NL80211_ATTR_IE]) {
5265                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5266                 memcpy((void *)request->ie,
5267                        nla_data(info->attrs[NL80211_ATTR_IE]),
5268                        request->ie_len);
5269         }
5270
5271         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5272                 if (wiphy->bands[i])
5273                         request->rates[i] =
5274                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5275
5276         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5277                 nla_for_each_nested(attr,
5278                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5279                                     tmp) {
5280                         enum ieee80211_band band = nla_type(attr);
5281
5282                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5283                                 err = -EINVAL;
5284                                 goto out_free;
5285                         }
5286                         err = ieee80211_get_ratemask(wiphy->bands[band],
5287                                                      nla_data(attr),
5288                                                      nla_len(attr),
5289                                                      &request->rates[band]);
5290                         if (err)
5291                                 goto out_free;
5292                 }
5293         }
5294
5295         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5296                 request->flags = nla_get_u32(
5297                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5298                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5299                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5300                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5301                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5302                         err = -EOPNOTSUPP;
5303                         goto out_free;
5304                 }
5305         }
5306
5307         request->no_cck =
5308                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5309
5310         request->wdev = wdev;
5311         request->wiphy = &rdev->wiphy;
5312         request->scan_start = jiffies;
5313
5314         rdev->scan_req = request;
5315         err = rdev_scan(rdev, request);
5316
5317         if (!err) {
5318                 nl80211_send_scan_start(rdev, wdev);
5319                 if (wdev->netdev)
5320                         dev_hold(wdev->netdev);
5321         } else {
5322  out_free:
5323                 rdev->scan_req = NULL;
5324                 kfree(request);
5325         }
5326
5327  unlock:
5328         return err;
5329 }
5330
5331 static int nl80211_start_sched_scan(struct sk_buff *skb,
5332                                     struct genl_info *info)
5333 {
5334         struct cfg80211_sched_scan_request *request;
5335         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5336         struct net_device *dev = info->user_ptr[1];
5337         struct nlattr *attr;
5338         struct wiphy *wiphy;
5339         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5340         u32 interval;
5341         enum ieee80211_band band;
5342         size_t ie_len;
5343         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5344
5345         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5346             !rdev->ops->sched_scan_start)
5347                 return -EOPNOTSUPP;
5348
5349         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5350                 return -EINVAL;
5351
5352         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5353                 return -EINVAL;
5354
5355         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5356         if (interval == 0)
5357                 return -EINVAL;
5358
5359         wiphy = &rdev->wiphy;
5360
5361         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5362                 n_channels = validate_scan_freqs(
5363                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5364                 if (!n_channels)
5365                         return -EINVAL;
5366         } else {
5367                 n_channels = 0;
5368
5369                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5370                         if (wiphy->bands[band])
5371                                 n_channels += wiphy->bands[band]->n_channels;
5372         }
5373
5374         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5375                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5376                                     tmp)
5377                         n_ssids++;
5378
5379         if (n_ssids > wiphy->max_sched_scan_ssids)
5380                 return -EINVAL;
5381
5382         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5383                 nla_for_each_nested(attr,
5384                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5385                                     tmp)
5386                         n_match_sets++;
5387
5388         if (n_match_sets > wiphy->max_match_sets)
5389                 return -EINVAL;
5390
5391         if (info->attrs[NL80211_ATTR_IE])
5392                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5393         else
5394                 ie_len = 0;
5395
5396         if (ie_len > wiphy->max_sched_scan_ie_len)
5397                 return -EINVAL;
5398
5399         if (rdev->sched_scan_req) {
5400                 err = -EINPROGRESS;
5401                 goto out;
5402         }
5403
5404         request = kzalloc(sizeof(*request)
5405                         + sizeof(*request->ssids) * n_ssids
5406                         + sizeof(*request->match_sets) * n_match_sets
5407                         + sizeof(*request->channels) * n_channels
5408                         + ie_len, GFP_KERNEL);
5409         if (!request) {
5410                 err = -ENOMEM;
5411                 goto out;
5412         }
5413
5414         if (n_ssids)
5415                 request->ssids = (void *)&request->channels[n_channels];
5416         request->n_ssids = n_ssids;
5417         if (ie_len) {
5418                 if (request->ssids)
5419                         request->ie = (void *)(request->ssids + n_ssids);
5420                 else
5421                         request->ie = (void *)(request->channels + n_channels);
5422         }
5423
5424         if (n_match_sets) {
5425                 if (request->ie)
5426                         request->match_sets = (void *)(request->ie + ie_len);
5427                 else if (request->ssids)
5428                         request->match_sets =
5429                                 (void *)(request->ssids + n_ssids);
5430                 else
5431                         request->match_sets =
5432                                 (void *)(request->channels + n_channels);
5433         }
5434         request->n_match_sets = n_match_sets;
5435
5436         i = 0;
5437         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5438                 /* user specified, bail out if channel not found */
5439                 nla_for_each_nested(attr,
5440                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5441                                     tmp) {
5442                         struct ieee80211_channel *chan;
5443
5444                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5445
5446                         if (!chan) {
5447                                 err = -EINVAL;
5448                                 goto out_free;
5449                         }
5450
5451                         /* ignore disabled channels */
5452                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5453                                 continue;
5454
5455                         request->channels[i] = chan;
5456                         i++;
5457                 }
5458         } else {
5459                 /* all channels */
5460                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5461                         int j;
5462                         if (!wiphy->bands[band])
5463                                 continue;
5464                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5465                                 struct ieee80211_channel *chan;
5466
5467                                 chan = &wiphy->bands[band]->channels[j];
5468
5469                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5470                                         continue;
5471
5472                                 request->channels[i] = chan;
5473                                 i++;
5474                         }
5475                 }
5476         }
5477
5478         if (!i) {
5479                 err = -EINVAL;
5480                 goto out_free;
5481         }
5482
5483         request->n_channels = i;
5484
5485         i = 0;
5486         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5487                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5488                                     tmp) {
5489                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5490                                 err = -EINVAL;
5491                                 goto out_free;
5492                         }
5493                         request->ssids[i].ssid_len = nla_len(attr);
5494                         memcpy(request->ssids[i].ssid, nla_data(attr),
5495                                nla_len(attr));
5496                         i++;
5497                 }
5498         }
5499
5500         i = 0;
5501         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5502                 nla_for_each_nested(attr,
5503                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5504                                     tmp) {
5505                         struct nlattr *ssid, *rssi;
5506
5507                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5508                                   nla_data(attr), nla_len(attr),
5509                                   nl80211_match_policy);
5510                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5511                         if (ssid) {
5512                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5513                                         err = -EINVAL;
5514                                         goto out_free;
5515                                 }
5516                                 memcpy(request->match_sets[i].ssid.ssid,
5517                                        nla_data(ssid), nla_len(ssid));
5518                                 request->match_sets[i].ssid.ssid_len =
5519                                         nla_len(ssid);
5520                         }
5521                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5522                         if (rssi)
5523                                 request->rssi_thold = nla_get_u32(rssi);
5524                         else
5525                                 request->rssi_thold =
5526                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5527                         i++;
5528                 }
5529         }
5530
5531         if (info->attrs[NL80211_ATTR_IE]) {
5532                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5533                 memcpy((void *)request->ie,
5534                        nla_data(info->attrs[NL80211_ATTR_IE]),
5535                        request->ie_len);
5536         }
5537
5538         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5539                 request->flags = nla_get_u32(
5540                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5541                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5542                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5543                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5544                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5545                         err = -EOPNOTSUPP;
5546                         goto out_free;
5547                 }
5548         }
5549
5550         request->dev = dev;
5551         request->wiphy = &rdev->wiphy;
5552         request->interval = interval;
5553         request->scan_start = jiffies;
5554
5555         err = rdev_sched_scan_start(rdev, dev, request);
5556         if (!err) {
5557                 rdev->sched_scan_req = request;
5558                 nl80211_send_sched_scan(rdev, dev,
5559                                         NL80211_CMD_START_SCHED_SCAN);
5560                 goto out;
5561         }
5562
5563 out_free:
5564         kfree(request);
5565 out:
5566         return err;
5567 }
5568
5569 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5570                                    struct genl_info *info)
5571 {
5572         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5573
5574         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5575             !rdev->ops->sched_scan_stop)
5576                 return -EOPNOTSUPP;
5577
5578         return __cfg80211_stop_sched_scan(rdev, false);
5579 }
5580
5581 static int nl80211_start_radar_detection(struct sk_buff *skb,
5582                                          struct genl_info *info)
5583 {
5584         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5585         struct net_device *dev = info->user_ptr[1];
5586         struct wireless_dev *wdev = dev->ieee80211_ptr;
5587         struct cfg80211_chan_def chandef;
5588         int err;
5589
5590         err = nl80211_parse_chandef(rdev, info, &chandef);
5591         if (err)
5592                 return err;
5593
5594         if (wdev->cac_started)
5595                 return -EBUSY;
5596
5597         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5598         if (err < 0)
5599                 return err;
5600
5601         if (err == 0)
5602                 return -EINVAL;
5603
5604         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5605                 return -EINVAL;
5606
5607         if (!rdev->ops->start_radar_detection)
5608                 return -EOPNOTSUPP;
5609
5610         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5611                                            chandef.chan, CHAN_MODE_SHARED,
5612                                            BIT(chandef.width));
5613         if (err)
5614                 return err;
5615
5616         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5617         if (!err) {
5618                 wdev->channel = chandef.chan;
5619                 wdev->cac_started = true;
5620                 wdev->cac_start_time = jiffies;
5621         }
5622         return err;
5623 }
5624
5625 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
5626 {
5627         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5628         struct net_device *dev = info->user_ptr[1];
5629         struct wireless_dev *wdev = dev->ieee80211_ptr;
5630         struct cfg80211_csa_settings params;
5631         /* csa_attrs is defined static to avoid waste of stack size - this
5632          * function is called under RTNL lock, so this should not be a problem.
5633          */
5634         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
5635         u8 radar_detect_width = 0;
5636         int err;
5637         bool need_new_beacon = false;
5638
5639         if (!rdev->ops->channel_switch ||
5640             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
5641                 return -EOPNOTSUPP;
5642
5643         switch (dev->ieee80211_ptr->iftype) {
5644         case NL80211_IFTYPE_AP:
5645         case NL80211_IFTYPE_P2P_GO:
5646                 need_new_beacon = true;
5647
5648                 /* useless if AP is not running */
5649                 if (!wdev->beacon_interval)
5650                         return -EINVAL;
5651                 break;
5652         case NL80211_IFTYPE_ADHOC:
5653                 break;
5654         default:
5655                 return -EOPNOTSUPP;
5656         }
5657
5658         memset(&params, 0, sizeof(params));
5659
5660         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5661             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
5662                 return -EINVAL;
5663
5664         /* only important for AP, IBSS and mesh create IEs internally */
5665         if (need_new_beacon &&
5666             (!info->attrs[NL80211_ATTR_CSA_IES] ||
5667              !info->attrs[NL80211_ATTR_CSA_C_OFF_BEACON]))
5668                 return -EINVAL;
5669
5670         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
5671
5672         if (!need_new_beacon)
5673                 goto skip_beacons;
5674
5675         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
5676         if (err)
5677                 return err;
5678
5679         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
5680                                info->attrs[NL80211_ATTR_CSA_IES],
5681                                nl80211_policy);
5682         if (err)
5683                 return err;
5684
5685         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
5686         if (err)
5687                 return err;
5688
5689         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
5690                 return -EINVAL;
5691
5692         params.counter_offset_beacon =
5693                 nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5694         if (params.counter_offset_beacon >= params.beacon_csa.tail_len)
5695                 return -EINVAL;
5696
5697         /* sanity check - counters should be the same */
5698         if (params.beacon_csa.tail[params.counter_offset_beacon] !=
5699             params.count)
5700                 return -EINVAL;
5701
5702         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
5703                 params.counter_offset_presp =
5704                         nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5705                 if (params.counter_offset_presp >=
5706                     params.beacon_csa.probe_resp_len)
5707                         return -EINVAL;
5708
5709                 if (params.beacon_csa.probe_resp[params.counter_offset_presp] !=
5710                     params.count)
5711                         return -EINVAL;
5712         }
5713
5714 skip_beacons:
5715         err = nl80211_parse_chandef(rdev, info, &params.chandef);
5716         if (err)
5717                 return err;
5718
5719         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
5720                 return -EINVAL;
5721
5722         /* DFS channels are only supported for AP/P2P GO ... for now. */
5723         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
5724             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO) {
5725                 err = cfg80211_chandef_dfs_required(wdev->wiphy,
5726                                                     &params.chandef);
5727                 if (err < 0) {
5728                         return err;
5729                 } else if (err) {
5730                         radar_detect_width = BIT(params.chandef.width);
5731                         params.radar_required = true;
5732                 }
5733         }
5734
5735         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5736                                            params.chandef.chan,
5737                                            CHAN_MODE_SHARED,
5738                                            radar_detect_width);
5739         if (err)
5740                 return err;
5741
5742         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
5743                 params.block_tx = true;
5744
5745         return rdev_channel_switch(rdev, dev, &params);
5746 }
5747
5748 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5749                             u32 seq, int flags,
5750                             struct cfg80211_registered_device *rdev,
5751                             struct wireless_dev *wdev,
5752                             struct cfg80211_internal_bss *intbss)
5753 {
5754         struct cfg80211_bss *res = &intbss->pub;
5755         const struct cfg80211_bss_ies *ies;
5756         void *hdr;
5757         struct nlattr *bss;
5758         bool tsf = false;
5759
5760         ASSERT_WDEV_LOCK(wdev);
5761
5762         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5763                              NL80211_CMD_NEW_SCAN_RESULTS);
5764         if (!hdr)
5765                 return -1;
5766
5767         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5768
5769         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5770                 goto nla_put_failure;
5771         if (wdev->netdev &&
5772             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5773                 goto nla_put_failure;
5774         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5775                 goto nla_put_failure;
5776
5777         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5778         if (!bss)
5779                 goto nla_put_failure;
5780         if ((!is_zero_ether_addr(res->bssid) &&
5781              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5782                 goto nla_put_failure;
5783
5784         rcu_read_lock();
5785         ies = rcu_dereference(res->ies);
5786         if (ies) {
5787                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5788                         goto fail_unlock_rcu;
5789                 tsf = true;
5790                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5791                                         ies->len, ies->data))
5792                         goto fail_unlock_rcu;
5793         }
5794         ies = rcu_dereference(res->beacon_ies);
5795         if (ies) {
5796                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5797                         goto fail_unlock_rcu;
5798                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5799                                         ies->len, ies->data))
5800                         goto fail_unlock_rcu;
5801         }
5802         rcu_read_unlock();
5803
5804         if (res->beacon_interval &&
5805             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5806                 goto nla_put_failure;
5807         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5808             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5809             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
5810             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5811                         jiffies_to_msecs(jiffies - intbss->ts)))
5812                 goto nla_put_failure;
5813
5814         switch (rdev->wiphy.signal_type) {
5815         case CFG80211_SIGNAL_TYPE_MBM:
5816                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5817                         goto nla_put_failure;
5818                 break;
5819         case CFG80211_SIGNAL_TYPE_UNSPEC:
5820                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5821                         goto nla_put_failure;
5822                 break;
5823         default:
5824                 break;
5825         }
5826
5827         switch (wdev->iftype) {
5828         case NL80211_IFTYPE_P2P_CLIENT:
5829         case NL80211_IFTYPE_STATION:
5830                 if (intbss == wdev->current_bss &&
5831                     nla_put_u32(msg, NL80211_BSS_STATUS,
5832                                 NL80211_BSS_STATUS_ASSOCIATED))
5833                         goto nla_put_failure;
5834                 break;
5835         case NL80211_IFTYPE_ADHOC:
5836                 if (intbss == wdev->current_bss &&
5837                     nla_put_u32(msg, NL80211_BSS_STATUS,
5838                                 NL80211_BSS_STATUS_IBSS_JOINED))
5839                         goto nla_put_failure;
5840                 break;
5841         default:
5842                 break;
5843         }
5844
5845         nla_nest_end(msg, bss);
5846
5847         return genlmsg_end(msg, hdr);
5848
5849  fail_unlock_rcu:
5850         rcu_read_unlock();
5851  nla_put_failure:
5852         genlmsg_cancel(msg, hdr);
5853         return -EMSGSIZE;
5854 }
5855
5856 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5857 {
5858         struct cfg80211_registered_device *rdev;
5859         struct cfg80211_internal_bss *scan;
5860         struct wireless_dev *wdev;
5861         int start = cb->args[2], idx = 0;
5862         int err;
5863
5864         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5865         if (err)
5866                 return err;
5867
5868         wdev_lock(wdev);
5869         spin_lock_bh(&rdev->bss_lock);
5870         cfg80211_bss_expire(rdev);
5871
5872         cb->seq = rdev->bss_generation;
5873
5874         list_for_each_entry(scan, &rdev->bss_list, list) {
5875                 if (++idx <= start)
5876                         continue;
5877                 if (nl80211_send_bss(skb, cb,
5878                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5879                                 rdev, wdev, scan) < 0) {
5880                         idx--;
5881                         break;
5882                 }
5883         }
5884
5885         spin_unlock_bh(&rdev->bss_lock);
5886         wdev_unlock(wdev);
5887
5888         cb->args[2] = idx;
5889         nl80211_finish_wdev_dump(rdev);
5890
5891         return skb->len;
5892 }
5893
5894 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5895                                 int flags, struct net_device *dev,
5896                                 struct survey_info *survey)
5897 {
5898         void *hdr;
5899         struct nlattr *infoattr;
5900
5901         hdr = nl80211hdr_put(msg, portid, seq, flags,
5902                              NL80211_CMD_NEW_SURVEY_RESULTS);
5903         if (!hdr)
5904                 return -ENOMEM;
5905
5906         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5907                 goto nla_put_failure;
5908
5909         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5910         if (!infoattr)
5911                 goto nla_put_failure;
5912
5913         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5914                         survey->channel->center_freq))
5915                 goto nla_put_failure;
5916
5917         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5918             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5919                 goto nla_put_failure;
5920         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5921             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5922                 goto nla_put_failure;
5923         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5924             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5925                         survey->channel_time))
5926                 goto nla_put_failure;
5927         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5928             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5929                         survey->channel_time_busy))
5930                 goto nla_put_failure;
5931         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5932             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5933                         survey->channel_time_ext_busy))
5934                 goto nla_put_failure;
5935         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5936             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5937                         survey->channel_time_rx))
5938                 goto nla_put_failure;
5939         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5940             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5941                         survey->channel_time_tx))
5942                 goto nla_put_failure;
5943
5944         nla_nest_end(msg, infoattr);
5945
5946         return genlmsg_end(msg, hdr);
5947
5948  nla_put_failure:
5949         genlmsg_cancel(msg, hdr);
5950         return -EMSGSIZE;
5951 }
5952
5953 static int nl80211_dump_survey(struct sk_buff *skb,
5954                         struct netlink_callback *cb)
5955 {
5956         struct survey_info survey;
5957         struct cfg80211_registered_device *dev;
5958         struct wireless_dev *wdev;
5959         int survey_idx = cb->args[2];
5960         int res;
5961
5962         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
5963         if (res)
5964                 return res;
5965
5966         if (!wdev->netdev) {
5967                 res = -EINVAL;
5968                 goto out_err;
5969         }
5970
5971         if (!dev->ops->dump_survey) {
5972                 res = -EOPNOTSUPP;
5973                 goto out_err;
5974         }
5975
5976         while (1) {
5977                 struct ieee80211_channel *chan;
5978
5979                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
5980                 if (res == -ENOENT)
5981                         break;
5982                 if (res)
5983                         goto out_err;
5984
5985                 /* Survey without a channel doesn't make sense */
5986                 if (!survey.channel) {
5987                         res = -EINVAL;
5988                         goto out;
5989                 }
5990
5991                 chan = ieee80211_get_channel(&dev->wiphy,
5992                                              survey.channel->center_freq);
5993                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5994                         survey_idx++;
5995                         continue;
5996                 }
5997
5998                 if (nl80211_send_survey(skb,
5999                                 NETLINK_CB(cb->skb).portid,
6000                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6001                                 wdev->netdev, &survey) < 0)
6002                         goto out;
6003                 survey_idx++;
6004         }
6005
6006  out:
6007         cb->args[2] = survey_idx;
6008         res = skb->len;
6009  out_err:
6010         nl80211_finish_wdev_dump(dev);
6011         return res;
6012 }
6013
6014 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6015 {
6016         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6017                                   NL80211_WPA_VERSION_2));
6018 }
6019
6020 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6021 {
6022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6023         struct net_device *dev = info->user_ptr[1];
6024         struct ieee80211_channel *chan;
6025         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6026         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6027         enum nl80211_auth_type auth_type;
6028         struct key_parse key;
6029         bool local_state_change;
6030
6031         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6032                 return -EINVAL;
6033
6034         if (!info->attrs[NL80211_ATTR_MAC])
6035                 return -EINVAL;
6036
6037         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6038                 return -EINVAL;
6039
6040         if (!info->attrs[NL80211_ATTR_SSID])
6041                 return -EINVAL;
6042
6043         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6044                 return -EINVAL;
6045
6046         err = nl80211_parse_key(info, &key);
6047         if (err)
6048                 return err;
6049
6050         if (key.idx >= 0) {
6051                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6052                         return -EINVAL;
6053                 if (!key.p.key || !key.p.key_len)
6054                         return -EINVAL;
6055                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6056                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6057                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6058                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6059                         return -EINVAL;
6060                 if (key.idx > 4)
6061                         return -EINVAL;
6062         } else {
6063                 key.p.key_len = 0;
6064                 key.p.key = NULL;
6065         }
6066
6067         if (key.idx >= 0) {
6068                 int i;
6069                 bool ok = false;
6070                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6071                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6072                                 ok = true;
6073                                 break;
6074                         }
6075                 }
6076                 if (!ok)
6077                         return -EINVAL;
6078         }
6079
6080         if (!rdev->ops->auth)
6081                 return -EOPNOTSUPP;
6082
6083         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6084             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6085                 return -EOPNOTSUPP;
6086
6087         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6088         chan = ieee80211_get_channel(&rdev->wiphy,
6089                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6090         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6091                 return -EINVAL;
6092
6093         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6094         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6095
6096         if (info->attrs[NL80211_ATTR_IE]) {
6097                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6098                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6099         }
6100
6101         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6102         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6103                 return -EINVAL;
6104
6105         if (auth_type == NL80211_AUTHTYPE_SAE &&
6106             !info->attrs[NL80211_ATTR_SAE_DATA])
6107                 return -EINVAL;
6108
6109         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6110                 if (auth_type != NL80211_AUTHTYPE_SAE)
6111                         return -EINVAL;
6112                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6113                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6114                 /* need to include at least Auth Transaction and Status Code */
6115                 if (sae_data_len < 4)
6116                         return -EINVAL;
6117         }
6118
6119         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6120
6121         /*
6122          * Since we no longer track auth state, ignore
6123          * requests to only change local state.
6124          */
6125         if (local_state_change)
6126                 return 0;
6127
6128         wdev_lock(dev->ieee80211_ptr);
6129         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6130                                  ssid, ssid_len, ie, ie_len,
6131                                  key.p.key, key.p.key_len, key.idx,
6132                                  sae_data, sae_data_len);
6133         wdev_unlock(dev->ieee80211_ptr);
6134         return err;
6135 }
6136
6137 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6138                                    struct genl_info *info,
6139                                    struct cfg80211_crypto_settings *settings,
6140                                    int cipher_limit)
6141 {
6142         memset(settings, 0, sizeof(*settings));
6143
6144         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6145
6146         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6147                 u16 proto;
6148                 proto = nla_get_u16(
6149                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6150                 settings->control_port_ethertype = cpu_to_be16(proto);
6151                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6152                     proto != ETH_P_PAE)
6153                         return -EINVAL;
6154                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6155                         settings->control_port_no_encrypt = true;
6156         } else
6157                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6158
6159         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6160                 void *data;
6161                 int len, i;
6162
6163                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6164                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6165                 settings->n_ciphers_pairwise = len / sizeof(u32);
6166
6167                 if (len % sizeof(u32))
6168                         return -EINVAL;
6169
6170                 if (settings->n_ciphers_pairwise > cipher_limit)
6171                         return -EINVAL;
6172
6173                 memcpy(settings->ciphers_pairwise, data, len);
6174
6175                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6176                         if (!cfg80211_supported_cipher_suite(
6177                                         &rdev->wiphy,
6178                                         settings->ciphers_pairwise[i]))
6179                                 return -EINVAL;
6180         }
6181
6182         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6183                 settings->cipher_group =
6184                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6185                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6186                                                      settings->cipher_group))
6187                         return -EINVAL;
6188         }
6189
6190         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6191                 settings->wpa_versions =
6192                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6193                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6194                         return -EINVAL;
6195         }
6196
6197         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6198                 void *data;
6199                 int len;
6200
6201                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6202                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6203                 settings->n_akm_suites = len / sizeof(u32);
6204
6205                 if (len % sizeof(u32))
6206                         return -EINVAL;
6207
6208                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6209                         return -EINVAL;
6210
6211                 memcpy(settings->akm_suites, data, len);
6212         }
6213
6214         return 0;
6215 }
6216
6217 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6218 {
6219         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6220         struct net_device *dev = info->user_ptr[1];
6221         struct ieee80211_channel *chan;
6222         struct cfg80211_assoc_request req = {};
6223         const u8 *bssid, *ssid;
6224         int err, ssid_len = 0;
6225
6226         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6227                 return -EINVAL;
6228
6229         if (!info->attrs[NL80211_ATTR_MAC] ||
6230             !info->attrs[NL80211_ATTR_SSID] ||
6231             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6232                 return -EINVAL;
6233
6234         if (!rdev->ops->assoc)
6235                 return -EOPNOTSUPP;
6236
6237         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6238             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6239                 return -EOPNOTSUPP;
6240
6241         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6242
6243         chan = ieee80211_get_channel(&rdev->wiphy,
6244                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6245         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6246                 return -EINVAL;
6247
6248         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6249         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6250
6251         if (info->attrs[NL80211_ATTR_IE]) {
6252                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6253                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6254         }
6255
6256         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6257                 enum nl80211_mfp mfp =
6258                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6259                 if (mfp == NL80211_MFP_REQUIRED)
6260                         req.use_mfp = true;
6261                 else if (mfp != NL80211_MFP_NO)
6262                         return -EINVAL;
6263         }
6264
6265         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6266                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6267
6268         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6269                 req.flags |= ASSOC_REQ_DISABLE_HT;
6270
6271         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6272                 memcpy(&req.ht_capa_mask,
6273                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6274                        sizeof(req.ht_capa_mask));
6275
6276         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6277                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6278                         return -EINVAL;
6279                 memcpy(&req.ht_capa,
6280                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6281                        sizeof(req.ht_capa));
6282         }
6283
6284         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6285                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6286
6287         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6288                 memcpy(&req.vht_capa_mask,
6289                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6290                        sizeof(req.vht_capa_mask));
6291
6292         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6293                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6294                         return -EINVAL;
6295                 memcpy(&req.vht_capa,
6296                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6297                        sizeof(req.vht_capa));
6298         }
6299
6300         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6301         if (!err) {
6302                 wdev_lock(dev->ieee80211_ptr);
6303                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6304                                           ssid, ssid_len, &req);
6305                 wdev_unlock(dev->ieee80211_ptr);
6306         }
6307
6308         return err;
6309 }
6310
6311 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6312 {
6313         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6314         struct net_device *dev = info->user_ptr[1];
6315         const u8 *ie = NULL, *bssid;
6316         int ie_len = 0, err;
6317         u16 reason_code;
6318         bool local_state_change;
6319
6320         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6321                 return -EINVAL;
6322
6323         if (!info->attrs[NL80211_ATTR_MAC])
6324                 return -EINVAL;
6325
6326         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6327                 return -EINVAL;
6328
6329         if (!rdev->ops->deauth)
6330                 return -EOPNOTSUPP;
6331
6332         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6333             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6334                 return -EOPNOTSUPP;
6335
6336         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6337
6338         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6339         if (reason_code == 0) {
6340                 /* Reason Code 0 is reserved */
6341                 return -EINVAL;
6342         }
6343
6344         if (info->attrs[NL80211_ATTR_IE]) {
6345                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6346                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6347         }
6348
6349         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6350
6351         wdev_lock(dev->ieee80211_ptr);
6352         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6353                                    local_state_change);
6354         wdev_unlock(dev->ieee80211_ptr);
6355         return err;
6356 }
6357
6358 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6359 {
6360         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6361         struct net_device *dev = info->user_ptr[1];
6362         const u8 *ie = NULL, *bssid;
6363         int ie_len = 0, err;
6364         u16 reason_code;
6365         bool local_state_change;
6366
6367         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6368                 return -EINVAL;
6369
6370         if (!info->attrs[NL80211_ATTR_MAC])
6371                 return -EINVAL;
6372
6373         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6374                 return -EINVAL;
6375
6376         if (!rdev->ops->disassoc)
6377                 return -EOPNOTSUPP;
6378
6379         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6380             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6381                 return -EOPNOTSUPP;
6382
6383         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6384
6385         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6386         if (reason_code == 0) {
6387                 /* Reason Code 0 is reserved */
6388                 return -EINVAL;
6389         }
6390
6391         if (info->attrs[NL80211_ATTR_IE]) {
6392                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6393                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6394         }
6395
6396         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6397
6398         wdev_lock(dev->ieee80211_ptr);
6399         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6400                                      local_state_change);
6401         wdev_unlock(dev->ieee80211_ptr);
6402         return err;
6403 }
6404
6405 static bool
6406 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6407                          int mcast_rate[IEEE80211_NUM_BANDS],
6408                          int rateval)
6409 {
6410         struct wiphy *wiphy = &rdev->wiphy;
6411         bool found = false;
6412         int band, i;
6413
6414         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6415                 struct ieee80211_supported_band *sband;
6416
6417                 sband = wiphy->bands[band];
6418                 if (!sband)
6419                         continue;
6420
6421                 for (i = 0; i < sband->n_bitrates; i++) {
6422                         if (sband->bitrates[i].bitrate == rateval) {
6423                                 mcast_rate[band] = i + 1;
6424                                 found = true;
6425                                 break;
6426                         }
6427                 }
6428         }
6429
6430         return found;
6431 }
6432
6433 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6434 {
6435         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6436         struct net_device *dev = info->user_ptr[1];
6437         struct cfg80211_ibss_params ibss;
6438         struct wiphy *wiphy;
6439         struct cfg80211_cached_keys *connkeys = NULL;
6440         int err;
6441
6442         memset(&ibss, 0, sizeof(ibss));
6443
6444         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6445                 return -EINVAL;
6446
6447         if (!info->attrs[NL80211_ATTR_SSID] ||
6448             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6449                 return -EINVAL;
6450
6451         ibss.beacon_interval = 100;
6452
6453         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6454                 ibss.beacon_interval =
6455                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6456                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6457                         return -EINVAL;
6458         }
6459
6460         if (!rdev->ops->join_ibss)
6461                 return -EOPNOTSUPP;
6462
6463         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6464                 return -EOPNOTSUPP;
6465
6466         wiphy = &rdev->wiphy;
6467
6468         if (info->attrs[NL80211_ATTR_MAC]) {
6469                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6470
6471                 if (!is_valid_ether_addr(ibss.bssid))
6472                         return -EINVAL;
6473         }
6474         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6475         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6476
6477         if (info->attrs[NL80211_ATTR_IE]) {
6478                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6479                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6480         }
6481
6482         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6483         if (err)
6484                 return err;
6485
6486         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6487                 return -EINVAL;
6488
6489         switch (ibss.chandef.width) {
6490         case NL80211_CHAN_WIDTH_5:
6491         case NL80211_CHAN_WIDTH_10:
6492         case NL80211_CHAN_WIDTH_20_NOHT:
6493                 break;
6494         case NL80211_CHAN_WIDTH_20:
6495         case NL80211_CHAN_WIDTH_40:
6496                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6497                         break;
6498         default:
6499                 return -EINVAL;
6500         }
6501
6502         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6503         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6504
6505         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6506                 u8 *rates =
6507                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6508                 int n_rates =
6509                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6510                 struct ieee80211_supported_band *sband =
6511                         wiphy->bands[ibss.chandef.chan->band];
6512
6513                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6514                                              &ibss.basic_rates);
6515                 if (err)
6516                         return err;
6517         }
6518
6519         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6520                 memcpy(&ibss.ht_capa_mask,
6521                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6522                        sizeof(ibss.ht_capa_mask));
6523
6524         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6525                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6526                         return -EINVAL;
6527                 memcpy(&ibss.ht_capa,
6528                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6529                        sizeof(ibss.ht_capa));
6530         }
6531
6532         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6533             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6534                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6535                 return -EINVAL;
6536
6537         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6538                 bool no_ht = false;
6539
6540                 connkeys = nl80211_parse_connkeys(rdev,
6541                                           info->attrs[NL80211_ATTR_KEYS],
6542                                           &no_ht);
6543                 if (IS_ERR(connkeys))
6544                         return PTR_ERR(connkeys);
6545
6546                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6547                     no_ht) {
6548                         kfree(connkeys);
6549                         return -EINVAL;
6550                 }
6551         }
6552
6553         ibss.control_port =
6554                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6555
6556         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6557         if (err)
6558                 kfree(connkeys);
6559         return err;
6560 }
6561
6562 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6563 {
6564         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6565         struct net_device *dev = info->user_ptr[1];
6566
6567         if (!rdev->ops->leave_ibss)
6568                 return -EOPNOTSUPP;
6569
6570         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6571                 return -EOPNOTSUPP;
6572
6573         return cfg80211_leave_ibss(rdev, dev, false);
6574 }
6575
6576 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6577 {
6578         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6579         struct net_device *dev = info->user_ptr[1];
6580         int mcast_rate[IEEE80211_NUM_BANDS];
6581         u32 nla_rate;
6582         int err;
6583
6584         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6585             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6586                 return -EOPNOTSUPP;
6587
6588         if (!rdev->ops->set_mcast_rate)
6589                 return -EOPNOTSUPP;
6590
6591         memset(mcast_rate, 0, sizeof(mcast_rate));
6592
6593         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6594                 return -EINVAL;
6595
6596         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6597         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6598                 return -EINVAL;
6599
6600         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6601
6602         return err;
6603 }
6604
6605
6606 #ifdef CONFIG_NL80211_TESTMODE
6607 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6608         .name = "testmode",
6609 };
6610
6611 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6612 {
6613         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6614         struct wireless_dev *wdev =
6615                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
6616         int err;
6617
6618         if (!rdev->ops->testmode_cmd)
6619                 return -EOPNOTSUPP;
6620
6621         if (IS_ERR(wdev)) {
6622                 err = PTR_ERR(wdev);
6623                 if (err != -EINVAL)
6624                         return err;
6625                 wdev = NULL;
6626         } else if (wdev->wiphy != &rdev->wiphy) {
6627                 return -EINVAL;
6628         }
6629
6630         if (!info->attrs[NL80211_ATTR_TESTDATA])
6631                 return -EINVAL;
6632
6633         rdev->testmode_info = info;
6634         err = rdev_testmode_cmd(rdev, wdev,
6635                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6636                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6637         rdev->testmode_info = NULL;
6638
6639         return err;
6640 }
6641
6642 static int nl80211_testmode_dump(struct sk_buff *skb,
6643                                  struct netlink_callback *cb)
6644 {
6645         struct cfg80211_registered_device *rdev;
6646         int err;
6647         long phy_idx;
6648         void *data = NULL;
6649         int data_len = 0;
6650
6651         rtnl_lock();
6652
6653         if (cb->args[0]) {
6654                 /*
6655                  * 0 is a valid index, but not valid for args[0],
6656                  * so we need to offset by 1.
6657                  */
6658                 phy_idx = cb->args[0] - 1;
6659         } else {
6660                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6661                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6662                                   nl80211_policy);
6663                 if (err)
6664                         goto out_err;
6665
6666                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6667                                                   nl80211_fam.attrbuf);
6668                 if (IS_ERR(rdev)) {
6669                         err = PTR_ERR(rdev);
6670                         goto out_err;
6671                 }
6672                 phy_idx = rdev->wiphy_idx;
6673                 rdev = NULL;
6674
6675                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6676                         cb->args[1] =
6677                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6678         }
6679
6680         if (cb->args[1]) {
6681                 data = nla_data((void *)cb->args[1]);
6682                 data_len = nla_len((void *)cb->args[1]);
6683         }
6684
6685         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6686         if (!rdev) {
6687                 err = -ENOENT;
6688                 goto out_err;
6689         }
6690
6691         if (!rdev->ops->testmode_dump) {
6692                 err = -EOPNOTSUPP;
6693                 goto out_err;
6694         }
6695
6696         while (1) {
6697                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6698                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6699                                            NL80211_CMD_TESTMODE);
6700                 struct nlattr *tmdata;
6701
6702                 if (!hdr)
6703                         break;
6704
6705                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6706                         genlmsg_cancel(skb, hdr);
6707                         break;
6708                 }
6709
6710                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6711                 if (!tmdata) {
6712                         genlmsg_cancel(skb, hdr);
6713                         break;
6714                 }
6715                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6716                 nla_nest_end(skb, tmdata);
6717
6718                 if (err == -ENOBUFS || err == -ENOENT) {
6719                         genlmsg_cancel(skb, hdr);
6720                         break;
6721                 } else if (err) {
6722                         genlmsg_cancel(skb, hdr);
6723                         goto out_err;
6724                 }
6725
6726                 genlmsg_end(skb, hdr);
6727         }
6728
6729         err = skb->len;
6730         /* see above */
6731         cb->args[0] = phy_idx + 1;
6732  out_err:
6733         rtnl_unlock();
6734         return err;
6735 }
6736
6737 static struct sk_buff *
6738 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6739                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6740 {
6741         struct sk_buff *skb;
6742         void *hdr;
6743         struct nlattr *data;
6744
6745         skb = nlmsg_new(approxlen + 100, gfp);
6746         if (!skb)
6747                 return NULL;
6748
6749         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6750         if (!hdr) {
6751                 kfree_skb(skb);
6752                 return NULL;
6753         }
6754
6755         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6756                 goto nla_put_failure;
6757         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6758
6759         ((void **)skb->cb)[0] = rdev;
6760         ((void **)skb->cb)[1] = hdr;
6761         ((void **)skb->cb)[2] = data;
6762
6763         return skb;
6764
6765  nla_put_failure:
6766         kfree_skb(skb);
6767         return NULL;
6768 }
6769
6770 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6771                                                   int approxlen)
6772 {
6773         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6774
6775         if (WARN_ON(!rdev->testmode_info))
6776                 return NULL;
6777
6778         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6779                                 rdev->testmode_info->snd_portid,
6780                                 rdev->testmode_info->snd_seq,
6781                                 GFP_KERNEL);
6782 }
6783 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6784
6785 int cfg80211_testmode_reply(struct sk_buff *skb)
6786 {
6787         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6788         void *hdr = ((void **)skb->cb)[1];
6789         struct nlattr *data = ((void **)skb->cb)[2];
6790
6791         if (WARN_ON(!rdev->testmode_info)) {
6792                 kfree_skb(skb);
6793                 return -EINVAL;
6794         }
6795
6796         nla_nest_end(skb, data);
6797         genlmsg_end(skb, hdr);
6798         return genlmsg_reply(skb, rdev->testmode_info);
6799 }
6800 EXPORT_SYMBOL(cfg80211_testmode_reply);
6801
6802 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6803                                                   int approxlen, gfp_t gfp)
6804 {
6805         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6806
6807         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6808 }
6809 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6810
6811 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6812 {
6813         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6814         void *hdr = ((void **)skb->cb)[1];
6815         struct nlattr *data = ((void **)skb->cb)[2];
6816
6817         nla_nest_end(skb, data);
6818         genlmsg_end(skb, hdr);
6819         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), skb, 0,
6820                                 nl80211_testmode_mcgrp.id, gfp);
6821 }
6822 EXPORT_SYMBOL(cfg80211_testmode_event);
6823 #endif
6824
6825 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6826 {
6827         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6828         struct net_device *dev = info->user_ptr[1];
6829         struct cfg80211_connect_params connect;
6830         struct wiphy *wiphy;
6831         struct cfg80211_cached_keys *connkeys = NULL;
6832         int err;
6833
6834         memset(&connect, 0, sizeof(connect));
6835
6836         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6837                 return -EINVAL;
6838
6839         if (!info->attrs[NL80211_ATTR_SSID] ||
6840             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6841                 return -EINVAL;
6842
6843         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6844                 connect.auth_type =
6845                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6846                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6847                                              NL80211_CMD_CONNECT))
6848                         return -EINVAL;
6849         } else
6850                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6851
6852         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6853
6854         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6855                                       NL80211_MAX_NR_CIPHER_SUITES);
6856         if (err)
6857                 return err;
6858
6859         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6860             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6861                 return -EOPNOTSUPP;
6862
6863         wiphy = &rdev->wiphy;
6864
6865         connect.bg_scan_period = -1;
6866         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6867                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6868                 connect.bg_scan_period =
6869                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6870         }
6871
6872         if (info->attrs[NL80211_ATTR_MAC])
6873                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6874         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6875         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6876
6877         if (info->attrs[NL80211_ATTR_IE]) {
6878                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6879                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6880         }
6881
6882         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6883                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6884                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6885                     connect.mfp != NL80211_MFP_NO)
6886                         return -EINVAL;
6887         } else {
6888                 connect.mfp = NL80211_MFP_NO;
6889         }
6890
6891         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6892                 connect.channel =
6893                         ieee80211_get_channel(wiphy,
6894                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6895                 if (!connect.channel ||
6896                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6897                         return -EINVAL;
6898         }
6899
6900         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6901                 connkeys = nl80211_parse_connkeys(rdev,
6902                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6903                 if (IS_ERR(connkeys))
6904                         return PTR_ERR(connkeys);
6905         }
6906
6907         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6908                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6909
6910         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6911                 memcpy(&connect.ht_capa_mask,
6912                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6913                        sizeof(connect.ht_capa_mask));
6914
6915         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6916                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6917                         kfree(connkeys);
6918                         return -EINVAL;
6919                 }
6920                 memcpy(&connect.ht_capa,
6921                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6922                        sizeof(connect.ht_capa));
6923         }
6924
6925         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6926                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6927
6928         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6929                 memcpy(&connect.vht_capa_mask,
6930                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6931                        sizeof(connect.vht_capa_mask));
6932
6933         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6934                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6935                         kfree(connkeys);
6936                         return -EINVAL;
6937                 }
6938                 memcpy(&connect.vht_capa,
6939                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6940                        sizeof(connect.vht_capa));
6941         }
6942
6943         wdev_lock(dev->ieee80211_ptr);
6944         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
6945         wdev_unlock(dev->ieee80211_ptr);
6946         if (err)
6947                 kfree(connkeys);
6948         return err;
6949 }
6950
6951 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6952 {
6953         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6954         struct net_device *dev = info->user_ptr[1];
6955         u16 reason;
6956         int ret;
6957
6958         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6959                 reason = WLAN_REASON_DEAUTH_LEAVING;
6960         else
6961                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6962
6963         if (reason == 0)
6964                 return -EINVAL;
6965
6966         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6967             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6968                 return -EOPNOTSUPP;
6969
6970         wdev_lock(dev->ieee80211_ptr);
6971         ret = cfg80211_disconnect(rdev, dev, reason, true);
6972         wdev_unlock(dev->ieee80211_ptr);
6973         return ret;
6974 }
6975
6976 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6977 {
6978         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6979         struct net *net;
6980         int err;
6981         u32 pid;
6982
6983         if (!info->attrs[NL80211_ATTR_PID])
6984                 return -EINVAL;
6985
6986         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6987
6988         net = get_net_ns_by_pid(pid);
6989         if (IS_ERR(net))
6990                 return PTR_ERR(net);
6991
6992         err = 0;
6993
6994         /* check if anything to do */
6995         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6996                 err = cfg80211_switch_netns(rdev, net);
6997
6998         put_net(net);
6999         return err;
7000 }
7001
7002 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7003 {
7004         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7005         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7006                         struct cfg80211_pmksa *pmksa) = NULL;
7007         struct net_device *dev = info->user_ptr[1];
7008         struct cfg80211_pmksa pmksa;
7009
7010         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7011
7012         if (!info->attrs[NL80211_ATTR_MAC])
7013                 return -EINVAL;
7014
7015         if (!info->attrs[NL80211_ATTR_PMKID])
7016                 return -EINVAL;
7017
7018         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7019         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7020
7021         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7022             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7023                 return -EOPNOTSUPP;
7024
7025         switch (info->genlhdr->cmd) {
7026         case NL80211_CMD_SET_PMKSA:
7027                 rdev_ops = rdev->ops->set_pmksa;
7028                 break;
7029         case NL80211_CMD_DEL_PMKSA:
7030                 rdev_ops = rdev->ops->del_pmksa;
7031                 break;
7032         default:
7033                 WARN_ON(1);
7034                 break;
7035         }
7036
7037         if (!rdev_ops)
7038                 return -EOPNOTSUPP;
7039
7040         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7041 }
7042
7043 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7044 {
7045         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7046         struct net_device *dev = info->user_ptr[1];
7047
7048         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7049             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7050                 return -EOPNOTSUPP;
7051
7052         if (!rdev->ops->flush_pmksa)
7053                 return -EOPNOTSUPP;
7054
7055         return rdev_flush_pmksa(rdev, dev);
7056 }
7057
7058 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7059 {
7060         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7061         struct net_device *dev = info->user_ptr[1];
7062         u8 action_code, dialog_token;
7063         u16 status_code;
7064         u8 *peer;
7065
7066         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7067             !rdev->ops->tdls_mgmt)
7068                 return -EOPNOTSUPP;
7069
7070         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7071             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7072             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7073             !info->attrs[NL80211_ATTR_IE] ||
7074             !info->attrs[NL80211_ATTR_MAC])
7075                 return -EINVAL;
7076
7077         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7078         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7079         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7080         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7081
7082         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7083                               dialog_token, status_code,
7084                               nla_data(info->attrs[NL80211_ATTR_IE]),
7085                               nla_len(info->attrs[NL80211_ATTR_IE]));
7086 }
7087
7088 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7089 {
7090         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7091         struct net_device *dev = info->user_ptr[1];
7092         enum nl80211_tdls_operation operation;
7093         u8 *peer;
7094
7095         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7096             !rdev->ops->tdls_oper)
7097                 return -EOPNOTSUPP;
7098
7099         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7100             !info->attrs[NL80211_ATTR_MAC])
7101                 return -EINVAL;
7102
7103         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7104         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7105
7106         return rdev_tdls_oper(rdev, dev, peer, operation);
7107 }
7108
7109 static int nl80211_remain_on_channel(struct sk_buff *skb,
7110                                      struct genl_info *info)
7111 {
7112         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7113         struct wireless_dev *wdev = info->user_ptr[1];
7114         struct cfg80211_chan_def chandef;
7115         struct sk_buff *msg;
7116         void *hdr;
7117         u64 cookie;
7118         u32 duration;
7119         int err;
7120
7121         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7122             !info->attrs[NL80211_ATTR_DURATION])
7123                 return -EINVAL;
7124
7125         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7126
7127         if (!rdev->ops->remain_on_channel ||
7128             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7129                 return -EOPNOTSUPP;
7130
7131         /*
7132          * We should be on that channel for at least a minimum amount of
7133          * time (10ms) but no longer than the driver supports.
7134          */
7135         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7136             duration > rdev->wiphy.max_remain_on_channel_duration)
7137                 return -EINVAL;
7138
7139         err = nl80211_parse_chandef(rdev, info, &chandef);
7140         if (err)
7141                 return err;
7142
7143         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7144         if (!msg)
7145                 return -ENOMEM;
7146
7147         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7148                              NL80211_CMD_REMAIN_ON_CHANNEL);
7149         if (!hdr) {
7150                 err = -ENOBUFS;
7151                 goto free_msg;
7152         }
7153
7154         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7155                                      duration, &cookie);
7156
7157         if (err)
7158                 goto free_msg;
7159
7160         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7161                 goto nla_put_failure;
7162
7163         genlmsg_end(msg, hdr);
7164
7165         return genlmsg_reply(msg, info);
7166
7167  nla_put_failure:
7168         err = -ENOBUFS;
7169  free_msg:
7170         nlmsg_free(msg);
7171         return err;
7172 }
7173
7174 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7175                                             struct genl_info *info)
7176 {
7177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7178         struct wireless_dev *wdev = info->user_ptr[1];
7179         u64 cookie;
7180
7181         if (!info->attrs[NL80211_ATTR_COOKIE])
7182                 return -EINVAL;
7183
7184         if (!rdev->ops->cancel_remain_on_channel)
7185                 return -EOPNOTSUPP;
7186
7187         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7188
7189         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7190 }
7191
7192 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7193                            u8 *rates, u8 rates_len)
7194 {
7195         u8 i;
7196         u32 mask = 0;
7197
7198         for (i = 0; i < rates_len; i++) {
7199                 int rate = (rates[i] & 0x7f) * 5;
7200                 int ridx;
7201                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7202                         struct ieee80211_rate *srate =
7203                                 &sband->bitrates[ridx];
7204                         if (rate == srate->bitrate) {
7205                                 mask |= 1 << ridx;
7206                                 break;
7207                         }
7208                 }
7209                 if (ridx == sband->n_bitrates)
7210                         return 0; /* rate not found */
7211         }
7212
7213         return mask;
7214 }
7215
7216 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7217                                u8 *rates, u8 rates_len,
7218                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7219 {
7220         u8 i;
7221
7222         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7223
7224         for (i = 0; i < rates_len; i++) {
7225                 int ridx, rbit;
7226
7227                 ridx = rates[i] / 8;
7228                 rbit = BIT(rates[i] % 8);
7229
7230                 /* check validity */
7231                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7232                         return false;
7233
7234                 /* check availability */
7235                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7236                         mcs[ridx] |= rbit;
7237                 else
7238                         return false;
7239         }
7240
7241         return true;
7242 }
7243
7244 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7245         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7246                                     .len = NL80211_MAX_SUPP_RATES },
7247         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
7248                                  .len = NL80211_MAX_SUPP_HT_RATES },
7249 };
7250
7251 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7252                                        struct genl_info *info)
7253 {
7254         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7255         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7256         struct cfg80211_bitrate_mask mask;
7257         int rem, i;
7258         struct net_device *dev = info->user_ptr[1];
7259         struct nlattr *tx_rates;
7260         struct ieee80211_supported_band *sband;
7261
7262         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7263                 return -EINVAL;
7264
7265         if (!rdev->ops->set_bitrate_mask)
7266                 return -EOPNOTSUPP;
7267
7268         memset(&mask, 0, sizeof(mask));
7269         /* Default to all rates enabled */
7270         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7271                 sband = rdev->wiphy.bands[i];
7272                 mask.control[i].legacy =
7273                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7274                 if (sband)
7275                         memcpy(mask.control[i].mcs,
7276                                sband->ht_cap.mcs.rx_mask,
7277                                sizeof(mask.control[i].mcs));
7278                 else
7279                         memset(mask.control[i].mcs, 0,
7280                                sizeof(mask.control[i].mcs));
7281         }
7282
7283         /*
7284          * The nested attribute uses enum nl80211_band as the index. This maps
7285          * directly to the enum ieee80211_band values used in cfg80211.
7286          */
7287         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7288         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7289         {
7290                 enum ieee80211_band band = nla_type(tx_rates);
7291                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7292                         return -EINVAL;
7293                 sband = rdev->wiphy.bands[band];
7294                 if (sband == NULL)
7295                         return -EINVAL;
7296                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7297                           nla_len(tx_rates), nl80211_txattr_policy);
7298                 if (tb[NL80211_TXRATE_LEGACY]) {
7299                         mask.control[band].legacy = rateset_to_mask(
7300                                 sband,
7301                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7302                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7303                         if ((mask.control[band].legacy == 0) &&
7304                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7305                                 return -EINVAL;
7306                 }
7307                 if (tb[NL80211_TXRATE_MCS]) {
7308                         if (!ht_rateset_to_mask(
7309                                         sband,
7310                                         nla_data(tb[NL80211_TXRATE_MCS]),
7311                                         nla_len(tb[NL80211_TXRATE_MCS]),
7312                                         mask.control[band].mcs))
7313                                 return -EINVAL;
7314                 }
7315
7316                 if (mask.control[band].legacy == 0) {
7317                         /* don't allow empty legacy rates if HT
7318                          * is not even supported. */
7319                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7320                                 return -EINVAL;
7321
7322                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7323                                 if (mask.control[band].mcs[i])
7324                                         break;
7325
7326                         /* legacy and mcs rates may not be both empty */
7327                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7328                                 return -EINVAL;
7329                 }
7330         }
7331
7332         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7333 }
7334
7335 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7336 {
7337         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7338         struct wireless_dev *wdev = info->user_ptr[1];
7339         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7340
7341         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7342                 return -EINVAL;
7343
7344         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7345                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7346
7347         switch (wdev->iftype) {
7348         case NL80211_IFTYPE_STATION:
7349         case NL80211_IFTYPE_ADHOC:
7350         case NL80211_IFTYPE_P2P_CLIENT:
7351         case NL80211_IFTYPE_AP:
7352         case NL80211_IFTYPE_AP_VLAN:
7353         case NL80211_IFTYPE_MESH_POINT:
7354         case NL80211_IFTYPE_P2P_GO:
7355         case NL80211_IFTYPE_P2P_DEVICE:
7356                 break;
7357         default:
7358                 return -EOPNOTSUPP;
7359         }
7360
7361         /* not much point in registering if we can't reply */
7362         if (!rdev->ops->mgmt_tx)
7363                 return -EOPNOTSUPP;
7364
7365         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7366                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7367                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7368 }
7369
7370 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7371 {
7372         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7373         struct wireless_dev *wdev = info->user_ptr[1];
7374         struct cfg80211_chan_def chandef;
7375         int err;
7376         void *hdr = NULL;
7377         u64 cookie;
7378         struct sk_buff *msg = NULL;
7379         unsigned int wait = 0;
7380         bool offchan, no_cck, dont_wait_for_ack;
7381
7382         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7383
7384         if (!info->attrs[NL80211_ATTR_FRAME])
7385                 return -EINVAL;
7386
7387         if (!rdev->ops->mgmt_tx)
7388                 return -EOPNOTSUPP;
7389
7390         switch (wdev->iftype) {
7391         case NL80211_IFTYPE_P2P_DEVICE:
7392                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7393                         return -EINVAL;
7394         case NL80211_IFTYPE_STATION:
7395         case NL80211_IFTYPE_ADHOC:
7396         case NL80211_IFTYPE_P2P_CLIENT:
7397         case NL80211_IFTYPE_AP:
7398         case NL80211_IFTYPE_AP_VLAN:
7399         case NL80211_IFTYPE_MESH_POINT:
7400         case NL80211_IFTYPE_P2P_GO:
7401                 break;
7402         default:
7403                 return -EOPNOTSUPP;
7404         }
7405
7406         if (info->attrs[NL80211_ATTR_DURATION]) {
7407                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7408                         return -EINVAL;
7409                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7410
7411                 /*
7412                  * We should wait on the channel for at least a minimum amount
7413                  * of time (10ms) but no longer than the driver supports.
7414                  */
7415                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7416                     wait > rdev->wiphy.max_remain_on_channel_duration)
7417                         return -EINVAL;
7418
7419         }
7420
7421         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7422
7423         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7424                 return -EINVAL;
7425
7426         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7427
7428         /* get the channel if any has been specified, otherwise pass NULL to
7429          * the driver. The latter will use the current one
7430          */
7431         chandef.chan = NULL;
7432         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7433                 err = nl80211_parse_chandef(rdev, info, &chandef);
7434                 if (err)
7435                         return err;
7436         }
7437
7438         if (!chandef.chan && offchan)
7439                 return -EINVAL;
7440
7441         if (!dont_wait_for_ack) {
7442                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7443                 if (!msg)
7444                         return -ENOMEM;
7445
7446                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7447                                      NL80211_CMD_FRAME);
7448                 if (!hdr) {
7449                         err = -ENOBUFS;
7450                         goto free_msg;
7451                 }
7452         }
7453
7454         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7455                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7456                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7457                                     no_cck, dont_wait_for_ack, &cookie);
7458         if (err)
7459                 goto free_msg;
7460
7461         if (msg) {
7462                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7463                         goto nla_put_failure;
7464
7465                 genlmsg_end(msg, hdr);
7466                 return genlmsg_reply(msg, info);
7467         }
7468
7469         return 0;
7470
7471  nla_put_failure:
7472         err = -ENOBUFS;
7473  free_msg:
7474         nlmsg_free(msg);
7475         return err;
7476 }
7477
7478 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7479 {
7480         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7481         struct wireless_dev *wdev = info->user_ptr[1];
7482         u64 cookie;
7483
7484         if (!info->attrs[NL80211_ATTR_COOKIE])
7485                 return -EINVAL;
7486
7487         if (!rdev->ops->mgmt_tx_cancel_wait)
7488                 return -EOPNOTSUPP;
7489
7490         switch (wdev->iftype) {
7491         case NL80211_IFTYPE_STATION:
7492         case NL80211_IFTYPE_ADHOC:
7493         case NL80211_IFTYPE_P2P_CLIENT:
7494         case NL80211_IFTYPE_AP:
7495         case NL80211_IFTYPE_AP_VLAN:
7496         case NL80211_IFTYPE_P2P_GO:
7497         case NL80211_IFTYPE_P2P_DEVICE:
7498                 break;
7499         default:
7500                 return -EOPNOTSUPP;
7501         }
7502
7503         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7504
7505         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7506 }
7507
7508 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7509 {
7510         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7511         struct wireless_dev *wdev;
7512         struct net_device *dev = info->user_ptr[1];
7513         u8 ps_state;
7514         bool state;
7515         int err;
7516
7517         if (!info->attrs[NL80211_ATTR_PS_STATE])
7518                 return -EINVAL;
7519
7520         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7521
7522         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7523                 return -EINVAL;
7524
7525         wdev = dev->ieee80211_ptr;
7526
7527         if (!rdev->ops->set_power_mgmt)
7528                 return -EOPNOTSUPP;
7529
7530         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7531
7532         if (state == wdev->ps)
7533                 return 0;
7534
7535         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7536         if (!err)
7537                 wdev->ps = state;
7538         return err;
7539 }
7540
7541 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7542 {
7543         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7544         enum nl80211_ps_state ps_state;
7545         struct wireless_dev *wdev;
7546         struct net_device *dev = info->user_ptr[1];
7547         struct sk_buff *msg;
7548         void *hdr;
7549         int err;
7550
7551         wdev = dev->ieee80211_ptr;
7552
7553         if (!rdev->ops->set_power_mgmt)
7554                 return -EOPNOTSUPP;
7555
7556         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7557         if (!msg)
7558                 return -ENOMEM;
7559
7560         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7561                              NL80211_CMD_GET_POWER_SAVE);
7562         if (!hdr) {
7563                 err = -ENOBUFS;
7564                 goto free_msg;
7565         }
7566
7567         if (wdev->ps)
7568                 ps_state = NL80211_PS_ENABLED;
7569         else
7570                 ps_state = NL80211_PS_DISABLED;
7571
7572         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7573                 goto nla_put_failure;
7574
7575         genlmsg_end(msg, hdr);
7576         return genlmsg_reply(msg, info);
7577
7578  nla_put_failure:
7579         err = -ENOBUFS;
7580  free_msg:
7581         nlmsg_free(msg);
7582         return err;
7583 }
7584
7585 static struct nla_policy
7586 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7587         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7588         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7589         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7590         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7591         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7592         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7593 };
7594
7595 static int nl80211_set_cqm_txe(struct genl_info *info,
7596                                u32 rate, u32 pkts, u32 intvl)
7597 {
7598         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7599         struct net_device *dev = info->user_ptr[1];
7600         struct wireless_dev *wdev = dev->ieee80211_ptr;
7601
7602         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7603                 return -EINVAL;
7604
7605         if (!rdev->ops->set_cqm_txe_config)
7606                 return -EOPNOTSUPP;
7607
7608         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7609             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7610                 return -EOPNOTSUPP;
7611
7612         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7613 }
7614
7615 static int nl80211_set_cqm_rssi(struct genl_info *info,
7616                                 s32 threshold, u32 hysteresis)
7617 {
7618         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7619         struct net_device *dev = info->user_ptr[1];
7620         struct wireless_dev *wdev = dev->ieee80211_ptr;
7621
7622         if (threshold > 0)
7623                 return -EINVAL;
7624
7625         /* disabling - hysteresis should also be zero then */
7626         if (threshold == 0)
7627                 hysteresis = 0;
7628
7629         if (!rdev->ops->set_cqm_rssi_config)
7630                 return -EOPNOTSUPP;
7631
7632         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7633             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7634                 return -EOPNOTSUPP;
7635
7636         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7637 }
7638
7639 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7640 {
7641         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7642         struct nlattr *cqm;
7643         int err;
7644
7645         cqm = info->attrs[NL80211_ATTR_CQM];
7646         if (!cqm)
7647                 return -EINVAL;
7648
7649         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7650                                nl80211_attr_cqm_policy);
7651         if (err)
7652                 return err;
7653
7654         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7655             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7656                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7657                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7658
7659                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
7660         }
7661
7662         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7663             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7664             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7665                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7666                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7667                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7668
7669                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
7670         }
7671
7672         return -EINVAL;
7673 }
7674
7675 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7676 {
7677         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7678         struct net_device *dev = info->user_ptr[1];
7679         struct mesh_config cfg;
7680         struct mesh_setup setup;
7681         int err;
7682
7683         /* start with default */
7684         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7685         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7686
7687         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7688                 /* and parse parameters if given */
7689                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7690                 if (err)
7691                         return err;
7692         }
7693
7694         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7695             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7696                 return -EINVAL;
7697
7698         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7699         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7700
7701         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7702             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7703                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7704                         return -EINVAL;
7705
7706         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7707                 setup.beacon_interval =
7708                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7709                 if (setup.beacon_interval < 10 ||
7710                     setup.beacon_interval > 10000)
7711                         return -EINVAL;
7712         }
7713
7714         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7715                 setup.dtim_period =
7716                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7717                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7718                         return -EINVAL;
7719         }
7720
7721         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7722                 /* parse additional setup parameters if given */
7723                 err = nl80211_parse_mesh_setup(info, &setup);
7724                 if (err)
7725                         return err;
7726         }
7727
7728         if (setup.user_mpm)
7729                 cfg.auto_open_plinks = false;
7730
7731         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7732                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7733                 if (err)
7734                         return err;
7735         } else {
7736                 /* cfg80211_join_mesh() will sort it out */
7737                 setup.chandef.chan = NULL;
7738         }
7739
7740         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7741                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7742                 int n_rates =
7743                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7744                 struct ieee80211_supported_band *sband;
7745
7746                 if (!setup.chandef.chan)
7747                         return -EINVAL;
7748
7749                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
7750
7751                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7752                                              &setup.basic_rates);
7753                 if (err)
7754                         return err;
7755         }
7756
7757         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7758 }
7759
7760 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7761 {
7762         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7763         struct net_device *dev = info->user_ptr[1];
7764
7765         return cfg80211_leave_mesh(rdev, dev);
7766 }
7767
7768 #ifdef CONFIG_PM
7769 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7770                                         struct cfg80211_registered_device *rdev)
7771 {
7772         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7773         struct nlattr *nl_pats, *nl_pat;
7774         int i, pat_len;
7775
7776         if (!wowlan->n_patterns)
7777                 return 0;
7778
7779         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7780         if (!nl_pats)
7781                 return -ENOBUFS;
7782
7783         for (i = 0; i < wowlan->n_patterns; i++) {
7784                 nl_pat = nla_nest_start(msg, i + 1);
7785                 if (!nl_pat)
7786                         return -ENOBUFS;
7787                 pat_len = wowlan->patterns[i].pattern_len;
7788                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
7789                             wowlan->patterns[i].mask) ||
7790                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
7791                             wowlan->patterns[i].pattern) ||
7792                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
7793                                 wowlan->patterns[i].pkt_offset))
7794                         return -ENOBUFS;
7795                 nla_nest_end(msg, nl_pat);
7796         }
7797         nla_nest_end(msg, nl_pats);
7798
7799         return 0;
7800 }
7801
7802 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7803                                    struct cfg80211_wowlan_tcp *tcp)
7804 {
7805         struct nlattr *nl_tcp;
7806
7807         if (!tcp)
7808                 return 0;
7809
7810         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7811         if (!nl_tcp)
7812                 return -ENOBUFS;
7813
7814         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7815             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7816             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7817             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7818             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7819             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7820                     tcp->payload_len, tcp->payload) ||
7821             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7822                         tcp->data_interval) ||
7823             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7824                     tcp->wake_len, tcp->wake_data) ||
7825             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7826                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7827                 return -ENOBUFS;
7828
7829         if (tcp->payload_seq.len &&
7830             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7831                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7832                 return -ENOBUFS;
7833
7834         if (tcp->payload_tok.len &&
7835             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7836                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7837                     &tcp->payload_tok))
7838                 return -ENOBUFS;
7839
7840         nla_nest_end(msg, nl_tcp);
7841
7842         return 0;
7843 }
7844
7845 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7846 {
7847         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7848         struct sk_buff *msg;
7849         void *hdr;
7850         u32 size = NLMSG_DEFAULT_SIZE;
7851
7852         if (!rdev->wiphy.wowlan)
7853                 return -EOPNOTSUPP;
7854
7855         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7856                 /* adjust size to have room for all the data */
7857                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7858                         rdev->wiphy.wowlan_config->tcp->payload_len +
7859                         rdev->wiphy.wowlan_config->tcp->wake_len +
7860                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
7861         }
7862
7863         msg = nlmsg_new(size, GFP_KERNEL);
7864         if (!msg)
7865                 return -ENOMEM;
7866
7867         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7868                              NL80211_CMD_GET_WOWLAN);
7869         if (!hdr)
7870                 goto nla_put_failure;
7871
7872         if (rdev->wiphy.wowlan_config) {
7873                 struct nlattr *nl_wowlan;
7874
7875                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7876                 if (!nl_wowlan)
7877                         goto nla_put_failure;
7878
7879                 if ((rdev->wiphy.wowlan_config->any &&
7880                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7881                     (rdev->wiphy.wowlan_config->disconnect &&
7882                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7883                     (rdev->wiphy.wowlan_config->magic_pkt &&
7884                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7885                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7886                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7887                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7888                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7889                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7890                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7891                     (rdev->wiphy.wowlan_config->rfkill_release &&
7892                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7893                         goto nla_put_failure;
7894
7895                 if (nl80211_send_wowlan_patterns(msg, rdev))
7896                         goto nla_put_failure;
7897
7898                 if (nl80211_send_wowlan_tcp(msg,
7899                                             rdev->wiphy.wowlan_config->tcp))
7900                         goto nla_put_failure;
7901
7902                 nla_nest_end(msg, nl_wowlan);
7903         }
7904
7905         genlmsg_end(msg, hdr);
7906         return genlmsg_reply(msg, info);
7907
7908 nla_put_failure:
7909         nlmsg_free(msg);
7910         return -ENOBUFS;
7911 }
7912
7913 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7914                                     struct nlattr *attr,
7915                                     struct cfg80211_wowlan *trig)
7916 {
7917         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7918         struct cfg80211_wowlan_tcp *cfg;
7919         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7920         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7921         u32 size;
7922         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7923         int err, port;
7924
7925         if (!rdev->wiphy.wowlan->tcp)
7926                 return -EINVAL;
7927
7928         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7929                         nla_data(attr), nla_len(attr),
7930                         nl80211_wowlan_tcp_policy);
7931         if (err)
7932                 return err;
7933
7934         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7935             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7936             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7937             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7938             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7939             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7940             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7941             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7942                 return -EINVAL;
7943
7944         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7945         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
7946                 return -EINVAL;
7947
7948         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7949                         rdev->wiphy.wowlan->tcp->data_interval_max ||
7950             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7951                 return -EINVAL;
7952
7953         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7954         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
7955                 return -EINVAL;
7956
7957         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7958         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7959                 return -EINVAL;
7960
7961         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7962                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7963
7964                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7965                 tokens_size = tokln - sizeof(*tok);
7966
7967                 if (!tok->len || tokens_size % tok->len)
7968                         return -EINVAL;
7969                 if (!rdev->wiphy.wowlan->tcp->tok)
7970                         return -EINVAL;
7971                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
7972                         return -EINVAL;
7973                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
7974                         return -EINVAL;
7975                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
7976                         return -EINVAL;
7977                 if (tok->offset + tok->len > data_size)
7978                         return -EINVAL;
7979         }
7980
7981         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7982                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7983                 if (!rdev->wiphy.wowlan->tcp->seq)
7984                         return -EINVAL;
7985                 if (seq->len == 0 || seq->len > 4)
7986                         return -EINVAL;
7987                 if (seq->len + seq->offset > data_size)
7988                         return -EINVAL;
7989         }
7990
7991         size = sizeof(*cfg);
7992         size += data_size;
7993         size += wake_size + wake_mask_size;
7994         size += tokens_size;
7995
7996         cfg = kzalloc(size, GFP_KERNEL);
7997         if (!cfg)
7998                 return -ENOMEM;
7999         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8000         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8001         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8002                ETH_ALEN);
8003         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8004                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8005         else
8006                 port = 0;
8007 #ifdef CONFIG_INET
8008         /* allocate a socket and port for it and use it */
8009         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8010                             IPPROTO_TCP, &cfg->sock, 1);
8011         if (err) {
8012                 kfree(cfg);
8013                 return err;
8014         }
8015         if (inet_csk_get_port(cfg->sock->sk, port)) {
8016                 sock_release(cfg->sock);
8017                 kfree(cfg);
8018                 return -EADDRINUSE;
8019         }
8020         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8021 #else
8022         if (!port) {
8023                 kfree(cfg);
8024                 return -EINVAL;
8025         }
8026         cfg->src_port = port;
8027 #endif
8028
8029         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8030         cfg->payload_len = data_size;
8031         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8032         memcpy((void *)cfg->payload,
8033                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8034                data_size);
8035         if (seq)
8036                 cfg->payload_seq = *seq;
8037         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8038         cfg->wake_len = wake_size;
8039         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8040         memcpy((void *)cfg->wake_data,
8041                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8042                wake_size);
8043         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8044                          data_size + wake_size;
8045         memcpy((void *)cfg->wake_mask,
8046                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8047                wake_mask_size);
8048         if (tok) {
8049                 cfg->tokens_size = tokens_size;
8050                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8051         }
8052
8053         trig->tcp = cfg;
8054
8055         return 0;
8056 }
8057
8058 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8059 {
8060         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8061         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8062         struct cfg80211_wowlan new_triggers = {};
8063         struct cfg80211_wowlan *ntrig;
8064         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8065         int err, i;
8066         bool prev_enabled = rdev->wiphy.wowlan_config;
8067
8068         if (!wowlan)
8069                 return -EOPNOTSUPP;
8070
8071         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8072                 cfg80211_rdev_free_wowlan(rdev);
8073                 rdev->wiphy.wowlan_config = NULL;
8074                 goto set_wakeup;
8075         }
8076
8077         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8078                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8079                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8080                         nl80211_wowlan_policy);
8081         if (err)
8082                 return err;
8083
8084         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8085                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8086                         return -EINVAL;
8087                 new_triggers.any = true;
8088         }
8089
8090         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8091                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8092                         return -EINVAL;
8093                 new_triggers.disconnect = true;
8094         }
8095
8096         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8097                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8098                         return -EINVAL;
8099                 new_triggers.magic_pkt = true;
8100         }
8101
8102         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8103                 return -EINVAL;
8104
8105         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8106                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8107                         return -EINVAL;
8108                 new_triggers.gtk_rekey_failure = true;
8109         }
8110
8111         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8112                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8113                         return -EINVAL;
8114                 new_triggers.eap_identity_req = true;
8115         }
8116
8117         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8118                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8119                         return -EINVAL;
8120                 new_triggers.four_way_handshake = true;
8121         }
8122
8123         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8124                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8125                         return -EINVAL;
8126                 new_triggers.rfkill_release = true;
8127         }
8128
8129         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8130                 struct nlattr *pat;
8131                 int n_patterns = 0;
8132                 int rem, pat_len, mask_len, pkt_offset;
8133                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8134
8135                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8136                                     rem)
8137                         n_patterns++;
8138                 if (n_patterns > wowlan->n_patterns)
8139                         return -EINVAL;
8140
8141                 new_triggers.patterns = kcalloc(n_patterns,
8142                                                 sizeof(new_triggers.patterns[0]),
8143                                                 GFP_KERNEL);
8144                 if (!new_triggers.patterns)
8145                         return -ENOMEM;
8146
8147                 new_triggers.n_patterns = n_patterns;
8148                 i = 0;
8149
8150                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8151                                     rem) {
8152                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8153                                   nla_len(pat), NULL);
8154                         err = -EINVAL;
8155                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8156                             !pat_tb[NL80211_PKTPAT_PATTERN])
8157                                 goto error;
8158                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8159                         mask_len = DIV_ROUND_UP(pat_len, 8);
8160                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8161                                 goto error;
8162                         if (pat_len > wowlan->pattern_max_len ||
8163                             pat_len < wowlan->pattern_min_len)
8164                                 goto error;
8165
8166                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8167                                 pkt_offset = 0;
8168                         else
8169                                 pkt_offset = nla_get_u32(
8170                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8171                         if (pkt_offset > wowlan->max_pkt_offset)
8172                                 goto error;
8173                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8174
8175                         new_triggers.patterns[i].mask =
8176                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
8177                         if (!new_triggers.patterns[i].mask) {
8178                                 err = -ENOMEM;
8179                                 goto error;
8180                         }
8181                         new_triggers.patterns[i].pattern =
8182                                 new_triggers.patterns[i].mask + mask_len;
8183                         memcpy(new_triggers.patterns[i].mask,
8184                                nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8185                                mask_len);
8186                         new_triggers.patterns[i].pattern_len = pat_len;
8187                         memcpy(new_triggers.patterns[i].pattern,
8188                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8189                                pat_len);
8190                         i++;
8191                 }
8192         }
8193
8194         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8195                 err = nl80211_parse_wowlan_tcp(
8196                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8197                         &new_triggers);
8198                 if (err)
8199                         goto error;
8200         }
8201
8202         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8203         if (!ntrig) {
8204                 err = -ENOMEM;
8205                 goto error;
8206         }
8207         cfg80211_rdev_free_wowlan(rdev);
8208         rdev->wiphy.wowlan_config = ntrig;
8209
8210  set_wakeup:
8211         if (rdev->ops->set_wakeup &&
8212             prev_enabled != !!rdev->wiphy.wowlan_config)
8213                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8214
8215         return 0;
8216  error:
8217         for (i = 0; i < new_triggers.n_patterns; i++)
8218                 kfree(new_triggers.patterns[i].mask);
8219         kfree(new_triggers.patterns);
8220         if (new_triggers.tcp && new_triggers.tcp->sock)
8221                 sock_release(new_triggers.tcp->sock);
8222         kfree(new_triggers.tcp);
8223         return err;
8224 }
8225 #endif
8226
8227 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8228                                        struct cfg80211_registered_device *rdev)
8229 {
8230         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8231         int i, j, pat_len;
8232         struct cfg80211_coalesce_rules *rule;
8233
8234         if (!rdev->coalesce->n_rules)
8235                 return 0;
8236
8237         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8238         if (!nl_rules)
8239                 return -ENOBUFS;
8240
8241         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8242                 nl_rule = nla_nest_start(msg, i + 1);
8243                 if (!nl_rule)
8244                         return -ENOBUFS;
8245
8246                 rule = &rdev->coalesce->rules[i];
8247                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8248                                 rule->delay))
8249                         return -ENOBUFS;
8250
8251                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8252                                 rule->condition))
8253                         return -ENOBUFS;
8254
8255                 nl_pats = nla_nest_start(msg,
8256                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8257                 if (!nl_pats)
8258                         return -ENOBUFS;
8259
8260                 for (j = 0; j < rule->n_patterns; j++) {
8261                         nl_pat = nla_nest_start(msg, j + 1);
8262                         if (!nl_pat)
8263                                 return -ENOBUFS;
8264                         pat_len = rule->patterns[j].pattern_len;
8265                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8266                                     DIV_ROUND_UP(pat_len, 8),
8267                                     rule->patterns[j].mask) ||
8268                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8269                                     rule->patterns[j].pattern) ||
8270                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8271                                         rule->patterns[j].pkt_offset))
8272                                 return -ENOBUFS;
8273                         nla_nest_end(msg, nl_pat);
8274                 }
8275                 nla_nest_end(msg, nl_pats);
8276                 nla_nest_end(msg, nl_rule);
8277         }
8278         nla_nest_end(msg, nl_rules);
8279
8280         return 0;
8281 }
8282
8283 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8284 {
8285         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8286         struct sk_buff *msg;
8287         void *hdr;
8288
8289         if (!rdev->wiphy.coalesce)
8290                 return -EOPNOTSUPP;
8291
8292         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8293         if (!msg)
8294                 return -ENOMEM;
8295
8296         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8297                              NL80211_CMD_GET_COALESCE);
8298         if (!hdr)
8299                 goto nla_put_failure;
8300
8301         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8302                 goto nla_put_failure;
8303
8304         genlmsg_end(msg, hdr);
8305         return genlmsg_reply(msg, info);
8306
8307 nla_put_failure:
8308         nlmsg_free(msg);
8309         return -ENOBUFS;
8310 }
8311
8312 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8313 {
8314         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8315         int i, j;
8316         struct cfg80211_coalesce_rules *rule;
8317
8318         if (!coalesce)
8319                 return;
8320
8321         for (i = 0; i < coalesce->n_rules; i++) {
8322                 rule = &coalesce->rules[i];
8323                 for (j = 0; j < rule->n_patterns; j++)
8324                         kfree(rule->patterns[j].mask);
8325                 kfree(rule->patterns);
8326         }
8327         kfree(coalesce->rules);
8328         kfree(coalesce);
8329         rdev->coalesce = NULL;
8330 }
8331
8332 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8333                                        struct nlattr *rule,
8334                                        struct cfg80211_coalesce_rules *new_rule)
8335 {
8336         int err, i;
8337         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8338         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8339         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8340         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8341
8342         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8343                         nla_len(rule), nl80211_coalesce_policy);
8344         if (err)
8345                 return err;
8346
8347         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8348                 new_rule->delay =
8349                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8350         if (new_rule->delay > coalesce->max_delay)
8351                 return -EINVAL;
8352
8353         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8354                 new_rule->condition =
8355                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8356         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8357             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8358                 return -EINVAL;
8359
8360         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8361                 return -EINVAL;
8362
8363         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8364                             rem)
8365                 n_patterns++;
8366         if (n_patterns > coalesce->n_patterns)
8367                 return -EINVAL;
8368
8369         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8370                                      GFP_KERNEL);
8371         if (!new_rule->patterns)
8372                 return -ENOMEM;
8373
8374         new_rule->n_patterns = n_patterns;
8375         i = 0;
8376
8377         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8378                             rem) {
8379                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8380                           nla_len(pat), NULL);
8381                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8382                     !pat_tb[NL80211_PKTPAT_PATTERN])
8383                         return -EINVAL;
8384                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8385                 mask_len = DIV_ROUND_UP(pat_len, 8);
8386                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8387                         return -EINVAL;
8388                 if (pat_len > coalesce->pattern_max_len ||
8389                     pat_len < coalesce->pattern_min_len)
8390                         return -EINVAL;
8391
8392                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8393                         pkt_offset = 0;
8394                 else
8395                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8396                 if (pkt_offset > coalesce->max_pkt_offset)
8397                         return -EINVAL;
8398                 new_rule->patterns[i].pkt_offset = pkt_offset;
8399
8400                 new_rule->patterns[i].mask =
8401                         kmalloc(mask_len + pat_len, GFP_KERNEL);
8402                 if (!new_rule->patterns[i].mask)
8403                         return -ENOMEM;
8404                 new_rule->patterns[i].pattern =
8405                         new_rule->patterns[i].mask + mask_len;
8406                 memcpy(new_rule->patterns[i].mask,
8407                        nla_data(pat_tb[NL80211_PKTPAT_MASK]), mask_len);
8408                 new_rule->patterns[i].pattern_len = pat_len;
8409                 memcpy(new_rule->patterns[i].pattern,
8410                        nla_data(pat_tb[NL80211_PKTPAT_PATTERN]), pat_len);
8411                 i++;
8412         }
8413
8414         return 0;
8415 }
8416
8417 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8418 {
8419         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8420         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8421         struct cfg80211_coalesce new_coalesce = {};
8422         struct cfg80211_coalesce *n_coalesce;
8423         int err, rem_rule, n_rules = 0, i, j;
8424         struct nlattr *rule;
8425         struct cfg80211_coalesce_rules *tmp_rule;
8426
8427         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8428                 return -EOPNOTSUPP;
8429
8430         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8431                 cfg80211_rdev_free_coalesce(rdev);
8432                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8433                 return 0;
8434         }
8435
8436         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8437                             rem_rule)
8438                 n_rules++;
8439         if (n_rules > coalesce->n_rules)
8440                 return -EINVAL;
8441
8442         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8443                                      GFP_KERNEL);
8444         if (!new_coalesce.rules)
8445                 return -ENOMEM;
8446
8447         new_coalesce.n_rules = n_rules;
8448         i = 0;
8449
8450         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8451                             rem_rule) {
8452                 err = nl80211_parse_coalesce_rule(rdev, rule,
8453                                                   &new_coalesce.rules[i]);
8454                 if (err)
8455                         goto error;
8456
8457                 i++;
8458         }
8459
8460         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8461         if (err)
8462                 goto error;
8463
8464         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8465         if (!n_coalesce) {
8466                 err = -ENOMEM;
8467                 goto error;
8468         }
8469         cfg80211_rdev_free_coalesce(rdev);
8470         rdev->coalesce = n_coalesce;
8471
8472         return 0;
8473 error:
8474         for (i = 0; i < new_coalesce.n_rules; i++) {
8475                 tmp_rule = &new_coalesce.rules[i];
8476                 for (j = 0; j < tmp_rule->n_patterns; j++)
8477                         kfree(tmp_rule->patterns[j].mask);
8478                 kfree(tmp_rule->patterns);
8479         }
8480         kfree(new_coalesce.rules);
8481
8482         return err;
8483 }
8484
8485 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8486 {
8487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8488         struct net_device *dev = info->user_ptr[1];
8489         struct wireless_dev *wdev = dev->ieee80211_ptr;
8490         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8491         struct cfg80211_gtk_rekey_data rekey_data;
8492         int err;
8493
8494         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8495                 return -EINVAL;
8496
8497         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8498                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8499                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8500                         nl80211_rekey_policy);
8501         if (err)
8502                 return err;
8503
8504         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8505                 return -ERANGE;
8506         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8507                 return -ERANGE;
8508         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8509                 return -ERANGE;
8510
8511         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8512                NL80211_KEK_LEN);
8513         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8514                NL80211_KCK_LEN);
8515         memcpy(rekey_data.replay_ctr,
8516                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8517                NL80211_REPLAY_CTR_LEN);
8518
8519         wdev_lock(wdev);
8520         if (!wdev->current_bss) {
8521                 err = -ENOTCONN;
8522                 goto out;
8523         }
8524
8525         if (!rdev->ops->set_rekey_data) {
8526                 err = -EOPNOTSUPP;
8527                 goto out;
8528         }
8529
8530         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8531  out:
8532         wdev_unlock(wdev);
8533         return err;
8534 }
8535
8536 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8537                                              struct genl_info *info)
8538 {
8539         struct net_device *dev = info->user_ptr[1];
8540         struct wireless_dev *wdev = dev->ieee80211_ptr;
8541
8542         if (wdev->iftype != NL80211_IFTYPE_AP &&
8543             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8544                 return -EINVAL;
8545
8546         if (wdev->ap_unexpected_nlportid)
8547                 return -EBUSY;
8548
8549         wdev->ap_unexpected_nlportid = info->snd_portid;
8550         return 0;
8551 }
8552
8553 static int nl80211_probe_client(struct sk_buff *skb,
8554                                 struct genl_info *info)
8555 {
8556         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8557         struct net_device *dev = info->user_ptr[1];
8558         struct wireless_dev *wdev = dev->ieee80211_ptr;
8559         struct sk_buff *msg;
8560         void *hdr;
8561         const u8 *addr;
8562         u64 cookie;
8563         int err;
8564
8565         if (wdev->iftype != NL80211_IFTYPE_AP &&
8566             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8567                 return -EOPNOTSUPP;
8568
8569         if (!info->attrs[NL80211_ATTR_MAC])
8570                 return -EINVAL;
8571
8572         if (!rdev->ops->probe_client)
8573                 return -EOPNOTSUPP;
8574
8575         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8576         if (!msg)
8577                 return -ENOMEM;
8578
8579         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8580                              NL80211_CMD_PROBE_CLIENT);
8581         if (!hdr) {
8582                 err = -ENOBUFS;
8583                 goto free_msg;
8584         }
8585
8586         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8587
8588         err = rdev_probe_client(rdev, dev, addr, &cookie);
8589         if (err)
8590                 goto free_msg;
8591
8592         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8593                 goto nla_put_failure;
8594
8595         genlmsg_end(msg, hdr);
8596
8597         return genlmsg_reply(msg, info);
8598
8599  nla_put_failure:
8600         err = -ENOBUFS;
8601  free_msg:
8602         nlmsg_free(msg);
8603         return err;
8604 }
8605
8606 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8607 {
8608         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8609         struct cfg80211_beacon_registration *reg, *nreg;
8610         int rv;
8611
8612         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8613                 return -EOPNOTSUPP;
8614
8615         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8616         if (!nreg)
8617                 return -ENOMEM;
8618
8619         /* First, check if already registered. */
8620         spin_lock_bh(&rdev->beacon_registrations_lock);
8621         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8622                 if (reg->nlportid == info->snd_portid) {
8623                         rv = -EALREADY;
8624                         goto out_err;
8625                 }
8626         }
8627         /* Add it to the list */
8628         nreg->nlportid = info->snd_portid;
8629         list_add(&nreg->list, &rdev->beacon_registrations);
8630
8631         spin_unlock_bh(&rdev->beacon_registrations_lock);
8632
8633         return 0;
8634 out_err:
8635         spin_unlock_bh(&rdev->beacon_registrations_lock);
8636         kfree(nreg);
8637         return rv;
8638 }
8639
8640 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8641 {
8642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8643         struct wireless_dev *wdev = info->user_ptr[1];
8644         int err;
8645
8646         if (!rdev->ops->start_p2p_device)
8647                 return -EOPNOTSUPP;
8648
8649         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8650                 return -EOPNOTSUPP;
8651
8652         if (wdev->p2p_started)
8653                 return 0;
8654
8655         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8656         if (err)
8657                 return err;
8658
8659         err = rdev_start_p2p_device(rdev, wdev);
8660         if (err)
8661                 return err;
8662
8663         wdev->p2p_started = true;
8664         rdev->opencount++;
8665
8666         return 0;
8667 }
8668
8669 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8670 {
8671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8672         struct wireless_dev *wdev = info->user_ptr[1];
8673
8674         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8675                 return -EOPNOTSUPP;
8676
8677         if (!rdev->ops->stop_p2p_device)
8678                 return -EOPNOTSUPP;
8679
8680         cfg80211_stop_p2p_device(rdev, wdev);
8681
8682         return 0;
8683 }
8684
8685 static int nl80211_get_protocol_features(struct sk_buff *skb,
8686                                          struct genl_info *info)
8687 {
8688         void *hdr;
8689         struct sk_buff *msg;
8690
8691         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8692         if (!msg)
8693                 return -ENOMEM;
8694
8695         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8696                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8697         if (!hdr)
8698                 goto nla_put_failure;
8699
8700         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8701                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8702                 goto nla_put_failure;
8703
8704         genlmsg_end(msg, hdr);
8705         return genlmsg_reply(msg, info);
8706
8707  nla_put_failure:
8708         kfree_skb(msg);
8709         return -ENOBUFS;
8710 }
8711
8712 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8713 {
8714         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8715         struct cfg80211_update_ft_ies_params ft_params;
8716         struct net_device *dev = info->user_ptr[1];
8717
8718         if (!rdev->ops->update_ft_ies)
8719                 return -EOPNOTSUPP;
8720
8721         if (!info->attrs[NL80211_ATTR_MDID] ||
8722             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8723                 return -EINVAL;
8724
8725         memset(&ft_params, 0, sizeof(ft_params));
8726         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8727         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8728         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8729
8730         return rdev_update_ft_ies(rdev, dev, &ft_params);
8731 }
8732
8733 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8734                                        struct genl_info *info)
8735 {
8736         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8737         struct wireless_dev *wdev = info->user_ptr[1];
8738         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8739         u16 duration;
8740         int ret;
8741
8742         if (!rdev->ops->crit_proto_start)
8743                 return -EOPNOTSUPP;
8744
8745         if (WARN_ON(!rdev->ops->crit_proto_stop))
8746                 return -EINVAL;
8747
8748         if (rdev->crit_proto_nlportid)
8749                 return -EBUSY;
8750
8751         /* determine protocol if provided */
8752         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8753                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8754
8755         if (proto >= NUM_NL80211_CRIT_PROTO)
8756                 return -EINVAL;
8757
8758         /* timeout must be provided */
8759         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8760                 return -EINVAL;
8761
8762         duration =
8763                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8764
8765         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8766                 return -ERANGE;
8767
8768         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8769         if (!ret)
8770                 rdev->crit_proto_nlportid = info->snd_portid;
8771
8772         return ret;
8773 }
8774
8775 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8776                                       struct genl_info *info)
8777 {
8778         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8779         struct wireless_dev *wdev = info->user_ptr[1];
8780
8781         if (!rdev->ops->crit_proto_stop)
8782                 return -EOPNOTSUPP;
8783
8784         if (rdev->crit_proto_nlportid) {
8785                 rdev->crit_proto_nlportid = 0;
8786                 rdev_crit_proto_stop(rdev, wdev);
8787         }
8788         return 0;
8789 }
8790
8791 #define NL80211_FLAG_NEED_WIPHY         0x01
8792 #define NL80211_FLAG_NEED_NETDEV        0x02
8793 #define NL80211_FLAG_NEED_RTNL          0x04
8794 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8795 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8796                                          NL80211_FLAG_CHECK_NETDEV_UP)
8797 #define NL80211_FLAG_NEED_WDEV          0x10
8798 /* If a netdev is associated, it must be UP, P2P must be started */
8799 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8800                                          NL80211_FLAG_CHECK_NETDEV_UP)
8801
8802 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8803                             struct genl_info *info)
8804 {
8805         struct cfg80211_registered_device *rdev;
8806         struct wireless_dev *wdev;
8807         struct net_device *dev;
8808         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8809
8810         if (rtnl)
8811                 rtnl_lock();
8812
8813         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8814                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8815                 if (IS_ERR(rdev)) {
8816                         if (rtnl)
8817                                 rtnl_unlock();
8818                         return PTR_ERR(rdev);
8819                 }
8820                 info->user_ptr[0] = rdev;
8821         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8822                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8823                 ASSERT_RTNL();
8824
8825                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8826                                                   info->attrs);
8827                 if (IS_ERR(wdev)) {
8828                         if (rtnl)
8829                                 rtnl_unlock();
8830                         return PTR_ERR(wdev);
8831                 }
8832
8833                 dev = wdev->netdev;
8834                 rdev = wiphy_to_dev(wdev->wiphy);
8835
8836                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8837                         if (!dev) {
8838                                 if (rtnl)
8839                                         rtnl_unlock();
8840                                 return -EINVAL;
8841                         }
8842
8843                         info->user_ptr[1] = dev;
8844                 } else {
8845                         info->user_ptr[1] = wdev;
8846                 }
8847
8848                 if (dev) {
8849                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8850                             !netif_running(dev)) {
8851                                 if (rtnl)
8852                                         rtnl_unlock();
8853                                 return -ENETDOWN;
8854                         }
8855
8856                         dev_hold(dev);
8857                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8858                         if (!wdev->p2p_started) {
8859                                 if (rtnl)
8860                                         rtnl_unlock();
8861                                 return -ENETDOWN;
8862                         }
8863                 }
8864
8865                 info->user_ptr[0] = rdev;
8866         }
8867
8868         return 0;
8869 }
8870
8871 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8872                               struct genl_info *info)
8873 {
8874         if (info->user_ptr[1]) {
8875                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8876                         struct wireless_dev *wdev = info->user_ptr[1];
8877
8878                         if (wdev->netdev)
8879                                 dev_put(wdev->netdev);
8880                 } else {
8881                         dev_put(info->user_ptr[1]);
8882                 }
8883         }
8884         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8885                 rtnl_unlock();
8886 }
8887
8888 static struct genl_ops nl80211_ops[] = {
8889         {
8890                 .cmd = NL80211_CMD_GET_WIPHY,
8891                 .doit = nl80211_get_wiphy,
8892                 .dumpit = nl80211_dump_wiphy,
8893                 .done = nl80211_dump_wiphy_done,
8894                 .policy = nl80211_policy,
8895                 /* can be retrieved by unprivileged users */
8896                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8897                                   NL80211_FLAG_NEED_RTNL,
8898         },
8899         {
8900                 .cmd = NL80211_CMD_SET_WIPHY,
8901                 .doit = nl80211_set_wiphy,
8902                 .policy = nl80211_policy,
8903                 .flags = GENL_ADMIN_PERM,
8904                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8905         },
8906         {
8907                 .cmd = NL80211_CMD_GET_INTERFACE,
8908                 .doit = nl80211_get_interface,
8909                 .dumpit = nl80211_dump_interface,
8910                 .policy = nl80211_policy,
8911                 /* can be retrieved by unprivileged users */
8912                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8913                                   NL80211_FLAG_NEED_RTNL,
8914         },
8915         {
8916                 .cmd = NL80211_CMD_SET_INTERFACE,
8917                 .doit = nl80211_set_interface,
8918                 .policy = nl80211_policy,
8919                 .flags = GENL_ADMIN_PERM,
8920                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8921                                   NL80211_FLAG_NEED_RTNL,
8922         },
8923         {
8924                 .cmd = NL80211_CMD_NEW_INTERFACE,
8925                 .doit = nl80211_new_interface,
8926                 .policy = nl80211_policy,
8927                 .flags = GENL_ADMIN_PERM,
8928                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8929                                   NL80211_FLAG_NEED_RTNL,
8930         },
8931         {
8932                 .cmd = NL80211_CMD_DEL_INTERFACE,
8933                 .doit = nl80211_del_interface,
8934                 .policy = nl80211_policy,
8935                 .flags = GENL_ADMIN_PERM,
8936                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8937                                   NL80211_FLAG_NEED_RTNL,
8938         },
8939         {
8940                 .cmd = NL80211_CMD_GET_KEY,
8941                 .doit = nl80211_get_key,
8942                 .policy = nl80211_policy,
8943                 .flags = GENL_ADMIN_PERM,
8944                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8945                                   NL80211_FLAG_NEED_RTNL,
8946         },
8947         {
8948                 .cmd = NL80211_CMD_SET_KEY,
8949                 .doit = nl80211_set_key,
8950                 .policy = nl80211_policy,
8951                 .flags = GENL_ADMIN_PERM,
8952                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8953                                   NL80211_FLAG_NEED_RTNL,
8954         },
8955         {
8956                 .cmd = NL80211_CMD_NEW_KEY,
8957                 .doit = nl80211_new_key,
8958                 .policy = nl80211_policy,
8959                 .flags = GENL_ADMIN_PERM,
8960                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8961                                   NL80211_FLAG_NEED_RTNL,
8962         },
8963         {
8964                 .cmd = NL80211_CMD_DEL_KEY,
8965                 .doit = nl80211_del_key,
8966                 .policy = nl80211_policy,
8967                 .flags = GENL_ADMIN_PERM,
8968                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8969                                   NL80211_FLAG_NEED_RTNL,
8970         },
8971         {
8972                 .cmd = NL80211_CMD_SET_BEACON,
8973                 .policy = nl80211_policy,
8974                 .flags = GENL_ADMIN_PERM,
8975                 .doit = nl80211_set_beacon,
8976                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8977                                   NL80211_FLAG_NEED_RTNL,
8978         },
8979         {
8980                 .cmd = NL80211_CMD_START_AP,
8981                 .policy = nl80211_policy,
8982                 .flags = GENL_ADMIN_PERM,
8983                 .doit = nl80211_start_ap,
8984                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8985                                   NL80211_FLAG_NEED_RTNL,
8986         },
8987         {
8988                 .cmd = NL80211_CMD_STOP_AP,
8989                 .policy = nl80211_policy,
8990                 .flags = GENL_ADMIN_PERM,
8991                 .doit = nl80211_stop_ap,
8992                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8993                                   NL80211_FLAG_NEED_RTNL,
8994         },
8995         {
8996                 .cmd = NL80211_CMD_GET_STATION,
8997                 .doit = nl80211_get_station,
8998                 .dumpit = nl80211_dump_station,
8999                 .policy = nl80211_policy,
9000                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9001                                   NL80211_FLAG_NEED_RTNL,
9002         },
9003         {
9004                 .cmd = NL80211_CMD_SET_STATION,
9005                 .doit = nl80211_set_station,
9006                 .policy = nl80211_policy,
9007                 .flags = GENL_ADMIN_PERM,
9008                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9009                                   NL80211_FLAG_NEED_RTNL,
9010         },
9011         {
9012                 .cmd = NL80211_CMD_NEW_STATION,
9013                 .doit = nl80211_new_station,
9014                 .policy = nl80211_policy,
9015                 .flags = GENL_ADMIN_PERM,
9016                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9017                                   NL80211_FLAG_NEED_RTNL,
9018         },
9019         {
9020                 .cmd = NL80211_CMD_DEL_STATION,
9021                 .doit = nl80211_del_station,
9022                 .policy = nl80211_policy,
9023                 .flags = GENL_ADMIN_PERM,
9024                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9025                                   NL80211_FLAG_NEED_RTNL,
9026         },
9027         {
9028                 .cmd = NL80211_CMD_GET_MPATH,
9029                 .doit = nl80211_get_mpath,
9030                 .dumpit = nl80211_dump_mpath,
9031                 .policy = nl80211_policy,
9032                 .flags = GENL_ADMIN_PERM,
9033                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9034                                   NL80211_FLAG_NEED_RTNL,
9035         },
9036         {
9037                 .cmd = NL80211_CMD_SET_MPATH,
9038                 .doit = nl80211_set_mpath,
9039                 .policy = nl80211_policy,
9040                 .flags = GENL_ADMIN_PERM,
9041                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9042                                   NL80211_FLAG_NEED_RTNL,
9043         },
9044         {
9045                 .cmd = NL80211_CMD_NEW_MPATH,
9046                 .doit = nl80211_new_mpath,
9047                 .policy = nl80211_policy,
9048                 .flags = GENL_ADMIN_PERM,
9049                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9050                                   NL80211_FLAG_NEED_RTNL,
9051         },
9052         {
9053                 .cmd = NL80211_CMD_DEL_MPATH,
9054                 .doit = nl80211_del_mpath,
9055                 .policy = nl80211_policy,
9056                 .flags = GENL_ADMIN_PERM,
9057                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9058                                   NL80211_FLAG_NEED_RTNL,
9059         },
9060         {
9061                 .cmd = NL80211_CMD_SET_BSS,
9062                 .doit = nl80211_set_bss,
9063                 .policy = nl80211_policy,
9064                 .flags = GENL_ADMIN_PERM,
9065                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9066                                   NL80211_FLAG_NEED_RTNL,
9067         },
9068         {
9069                 .cmd = NL80211_CMD_GET_REG,
9070                 .doit = nl80211_get_reg,
9071                 .policy = nl80211_policy,
9072                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9073                 /* can be retrieved by unprivileged users */
9074         },
9075         {
9076                 .cmd = NL80211_CMD_SET_REG,
9077                 .doit = nl80211_set_reg,
9078                 .policy = nl80211_policy,
9079                 .flags = GENL_ADMIN_PERM,
9080                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9081         },
9082         {
9083                 .cmd = NL80211_CMD_REQ_SET_REG,
9084                 .doit = nl80211_req_set_reg,
9085                 .policy = nl80211_policy,
9086                 .flags = GENL_ADMIN_PERM,
9087         },
9088         {
9089                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9090                 .doit = nl80211_get_mesh_config,
9091                 .policy = nl80211_policy,
9092                 /* can be retrieved by unprivileged users */
9093                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9094                                   NL80211_FLAG_NEED_RTNL,
9095         },
9096         {
9097                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9098                 .doit = nl80211_update_mesh_config,
9099                 .policy = nl80211_policy,
9100                 .flags = GENL_ADMIN_PERM,
9101                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9102                                   NL80211_FLAG_NEED_RTNL,
9103         },
9104         {
9105                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9106                 .doit = nl80211_trigger_scan,
9107                 .policy = nl80211_policy,
9108                 .flags = GENL_ADMIN_PERM,
9109                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9110                                   NL80211_FLAG_NEED_RTNL,
9111         },
9112         {
9113                 .cmd = NL80211_CMD_GET_SCAN,
9114                 .policy = nl80211_policy,
9115                 .dumpit = nl80211_dump_scan,
9116         },
9117         {
9118                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9119                 .doit = nl80211_start_sched_scan,
9120                 .policy = nl80211_policy,
9121                 .flags = GENL_ADMIN_PERM,
9122                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9123                                   NL80211_FLAG_NEED_RTNL,
9124         },
9125         {
9126                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9127                 .doit = nl80211_stop_sched_scan,
9128                 .policy = nl80211_policy,
9129                 .flags = GENL_ADMIN_PERM,
9130                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9131                                   NL80211_FLAG_NEED_RTNL,
9132         },
9133         {
9134                 .cmd = NL80211_CMD_AUTHENTICATE,
9135                 .doit = nl80211_authenticate,
9136                 .policy = nl80211_policy,
9137                 .flags = GENL_ADMIN_PERM,
9138                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9139                                   NL80211_FLAG_NEED_RTNL,
9140         },
9141         {
9142                 .cmd = NL80211_CMD_ASSOCIATE,
9143                 .doit = nl80211_associate,
9144                 .policy = nl80211_policy,
9145                 .flags = GENL_ADMIN_PERM,
9146                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9147                                   NL80211_FLAG_NEED_RTNL,
9148         },
9149         {
9150                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9151                 .doit = nl80211_deauthenticate,
9152                 .policy = nl80211_policy,
9153                 .flags = GENL_ADMIN_PERM,
9154                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9155                                   NL80211_FLAG_NEED_RTNL,
9156         },
9157         {
9158                 .cmd = NL80211_CMD_DISASSOCIATE,
9159                 .doit = nl80211_disassociate,
9160                 .policy = nl80211_policy,
9161                 .flags = GENL_ADMIN_PERM,
9162                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9163                                   NL80211_FLAG_NEED_RTNL,
9164         },
9165         {
9166                 .cmd = NL80211_CMD_JOIN_IBSS,
9167                 .doit = nl80211_join_ibss,
9168                 .policy = nl80211_policy,
9169                 .flags = GENL_ADMIN_PERM,
9170                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9171                                   NL80211_FLAG_NEED_RTNL,
9172         },
9173         {
9174                 .cmd = NL80211_CMD_LEAVE_IBSS,
9175                 .doit = nl80211_leave_ibss,
9176                 .policy = nl80211_policy,
9177                 .flags = GENL_ADMIN_PERM,
9178                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9179                                   NL80211_FLAG_NEED_RTNL,
9180         },
9181 #ifdef CONFIG_NL80211_TESTMODE
9182         {
9183                 .cmd = NL80211_CMD_TESTMODE,
9184                 .doit = nl80211_testmode_do,
9185                 .dumpit = nl80211_testmode_dump,
9186                 .policy = nl80211_policy,
9187                 .flags = GENL_ADMIN_PERM,
9188                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9189                                   NL80211_FLAG_NEED_RTNL,
9190         },
9191 #endif
9192         {
9193                 .cmd = NL80211_CMD_CONNECT,
9194                 .doit = nl80211_connect,
9195                 .policy = nl80211_policy,
9196                 .flags = GENL_ADMIN_PERM,
9197                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9198                                   NL80211_FLAG_NEED_RTNL,
9199         },
9200         {
9201                 .cmd = NL80211_CMD_DISCONNECT,
9202                 .doit = nl80211_disconnect,
9203                 .policy = nl80211_policy,
9204                 .flags = GENL_ADMIN_PERM,
9205                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9206                                   NL80211_FLAG_NEED_RTNL,
9207         },
9208         {
9209                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9210                 .doit = nl80211_wiphy_netns,
9211                 .policy = nl80211_policy,
9212                 .flags = GENL_ADMIN_PERM,
9213                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9214                                   NL80211_FLAG_NEED_RTNL,
9215         },
9216         {
9217                 .cmd = NL80211_CMD_GET_SURVEY,
9218                 .policy = nl80211_policy,
9219                 .dumpit = nl80211_dump_survey,
9220         },
9221         {
9222                 .cmd = NL80211_CMD_SET_PMKSA,
9223                 .doit = nl80211_setdel_pmksa,
9224                 .policy = nl80211_policy,
9225                 .flags = GENL_ADMIN_PERM,
9226                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9227                                   NL80211_FLAG_NEED_RTNL,
9228         },
9229         {
9230                 .cmd = NL80211_CMD_DEL_PMKSA,
9231                 .doit = nl80211_setdel_pmksa,
9232                 .policy = nl80211_policy,
9233                 .flags = GENL_ADMIN_PERM,
9234                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9235                                   NL80211_FLAG_NEED_RTNL,
9236         },
9237         {
9238                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9239                 .doit = nl80211_flush_pmksa,
9240                 .policy = nl80211_policy,
9241                 .flags = GENL_ADMIN_PERM,
9242                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9243                                   NL80211_FLAG_NEED_RTNL,
9244         },
9245         {
9246                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9247                 .doit = nl80211_remain_on_channel,
9248                 .policy = nl80211_policy,
9249                 .flags = GENL_ADMIN_PERM,
9250                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9251                                   NL80211_FLAG_NEED_RTNL,
9252         },
9253         {
9254                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9255                 .doit = nl80211_cancel_remain_on_channel,
9256                 .policy = nl80211_policy,
9257                 .flags = GENL_ADMIN_PERM,
9258                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9259                                   NL80211_FLAG_NEED_RTNL,
9260         },
9261         {
9262                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9263                 .doit = nl80211_set_tx_bitrate_mask,
9264                 .policy = nl80211_policy,
9265                 .flags = GENL_ADMIN_PERM,
9266                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9267                                   NL80211_FLAG_NEED_RTNL,
9268         },
9269         {
9270                 .cmd = NL80211_CMD_REGISTER_FRAME,
9271                 .doit = nl80211_register_mgmt,
9272                 .policy = nl80211_policy,
9273                 .flags = GENL_ADMIN_PERM,
9274                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9275                                   NL80211_FLAG_NEED_RTNL,
9276         },
9277         {
9278                 .cmd = NL80211_CMD_FRAME,
9279                 .doit = nl80211_tx_mgmt,
9280                 .policy = nl80211_policy,
9281                 .flags = GENL_ADMIN_PERM,
9282                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9283                                   NL80211_FLAG_NEED_RTNL,
9284         },
9285         {
9286                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9287                 .doit = nl80211_tx_mgmt_cancel_wait,
9288                 .policy = nl80211_policy,
9289                 .flags = GENL_ADMIN_PERM,
9290                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9291                                   NL80211_FLAG_NEED_RTNL,
9292         },
9293         {
9294                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9295                 .doit = nl80211_set_power_save,
9296                 .policy = nl80211_policy,
9297                 .flags = GENL_ADMIN_PERM,
9298                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9299                                   NL80211_FLAG_NEED_RTNL,
9300         },
9301         {
9302                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9303                 .doit = nl80211_get_power_save,
9304                 .policy = nl80211_policy,
9305                 /* can be retrieved by unprivileged users */
9306                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9307                                   NL80211_FLAG_NEED_RTNL,
9308         },
9309         {
9310                 .cmd = NL80211_CMD_SET_CQM,
9311                 .doit = nl80211_set_cqm,
9312                 .policy = nl80211_policy,
9313                 .flags = GENL_ADMIN_PERM,
9314                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9315                                   NL80211_FLAG_NEED_RTNL,
9316         },
9317         {
9318                 .cmd = NL80211_CMD_SET_CHANNEL,
9319                 .doit = nl80211_set_channel,
9320                 .policy = nl80211_policy,
9321                 .flags = GENL_ADMIN_PERM,
9322                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9323                                   NL80211_FLAG_NEED_RTNL,
9324         },
9325         {
9326                 .cmd = NL80211_CMD_SET_WDS_PEER,
9327                 .doit = nl80211_set_wds_peer,
9328                 .policy = nl80211_policy,
9329                 .flags = GENL_ADMIN_PERM,
9330                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9331                                   NL80211_FLAG_NEED_RTNL,
9332         },
9333         {
9334                 .cmd = NL80211_CMD_JOIN_MESH,
9335                 .doit = nl80211_join_mesh,
9336                 .policy = nl80211_policy,
9337                 .flags = GENL_ADMIN_PERM,
9338                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9339                                   NL80211_FLAG_NEED_RTNL,
9340         },
9341         {
9342                 .cmd = NL80211_CMD_LEAVE_MESH,
9343                 .doit = nl80211_leave_mesh,
9344                 .policy = nl80211_policy,
9345                 .flags = GENL_ADMIN_PERM,
9346                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9347                                   NL80211_FLAG_NEED_RTNL,
9348         },
9349 #ifdef CONFIG_PM
9350         {
9351                 .cmd = NL80211_CMD_GET_WOWLAN,
9352                 .doit = nl80211_get_wowlan,
9353                 .policy = nl80211_policy,
9354                 /* can be retrieved by unprivileged users */
9355                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9356                                   NL80211_FLAG_NEED_RTNL,
9357         },
9358         {
9359                 .cmd = NL80211_CMD_SET_WOWLAN,
9360                 .doit = nl80211_set_wowlan,
9361                 .policy = nl80211_policy,
9362                 .flags = GENL_ADMIN_PERM,
9363                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9364                                   NL80211_FLAG_NEED_RTNL,
9365         },
9366 #endif
9367         {
9368                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9369                 .doit = nl80211_set_rekey_data,
9370                 .policy = nl80211_policy,
9371                 .flags = GENL_ADMIN_PERM,
9372                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9373                                   NL80211_FLAG_NEED_RTNL,
9374         },
9375         {
9376                 .cmd = NL80211_CMD_TDLS_MGMT,
9377                 .doit = nl80211_tdls_mgmt,
9378                 .policy = nl80211_policy,
9379                 .flags = GENL_ADMIN_PERM,
9380                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9381                                   NL80211_FLAG_NEED_RTNL,
9382         },
9383         {
9384                 .cmd = NL80211_CMD_TDLS_OPER,
9385                 .doit = nl80211_tdls_oper,
9386                 .policy = nl80211_policy,
9387                 .flags = GENL_ADMIN_PERM,
9388                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9389                                   NL80211_FLAG_NEED_RTNL,
9390         },
9391         {
9392                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9393                 .doit = nl80211_register_unexpected_frame,
9394                 .policy = nl80211_policy,
9395                 .flags = GENL_ADMIN_PERM,
9396                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9397                                   NL80211_FLAG_NEED_RTNL,
9398         },
9399         {
9400                 .cmd = NL80211_CMD_PROBE_CLIENT,
9401                 .doit = nl80211_probe_client,
9402                 .policy = nl80211_policy,
9403                 .flags = GENL_ADMIN_PERM,
9404                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9405                                   NL80211_FLAG_NEED_RTNL,
9406         },
9407         {
9408                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9409                 .doit = nl80211_register_beacons,
9410                 .policy = nl80211_policy,
9411                 .flags = GENL_ADMIN_PERM,
9412                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9413                                   NL80211_FLAG_NEED_RTNL,
9414         },
9415         {
9416                 .cmd = NL80211_CMD_SET_NOACK_MAP,
9417                 .doit = nl80211_set_noack_map,
9418                 .policy = nl80211_policy,
9419                 .flags = GENL_ADMIN_PERM,
9420                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9421                                   NL80211_FLAG_NEED_RTNL,
9422         },
9423         {
9424                 .cmd = NL80211_CMD_START_P2P_DEVICE,
9425                 .doit = nl80211_start_p2p_device,
9426                 .policy = nl80211_policy,
9427                 .flags = GENL_ADMIN_PERM,
9428                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9429                                   NL80211_FLAG_NEED_RTNL,
9430         },
9431         {
9432                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
9433                 .doit = nl80211_stop_p2p_device,
9434                 .policy = nl80211_policy,
9435                 .flags = GENL_ADMIN_PERM,
9436                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9437                                   NL80211_FLAG_NEED_RTNL,
9438         },
9439         {
9440                 .cmd = NL80211_CMD_SET_MCAST_RATE,
9441                 .doit = nl80211_set_mcast_rate,
9442                 .policy = nl80211_policy,
9443                 .flags = GENL_ADMIN_PERM,
9444                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9445                                   NL80211_FLAG_NEED_RTNL,
9446         },
9447         {
9448                 .cmd = NL80211_CMD_SET_MAC_ACL,
9449                 .doit = nl80211_set_mac_acl,
9450                 .policy = nl80211_policy,
9451                 .flags = GENL_ADMIN_PERM,
9452                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9453                                   NL80211_FLAG_NEED_RTNL,
9454         },
9455         {
9456                 .cmd = NL80211_CMD_RADAR_DETECT,
9457                 .doit = nl80211_start_radar_detection,
9458                 .policy = nl80211_policy,
9459                 .flags = GENL_ADMIN_PERM,
9460                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9461                                   NL80211_FLAG_NEED_RTNL,
9462         },
9463         {
9464                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
9465                 .doit = nl80211_get_protocol_features,
9466                 .policy = nl80211_policy,
9467         },
9468         {
9469                 .cmd = NL80211_CMD_UPDATE_FT_IES,
9470                 .doit = nl80211_update_ft_ies,
9471                 .policy = nl80211_policy,
9472                 .flags = GENL_ADMIN_PERM,
9473                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9474                                   NL80211_FLAG_NEED_RTNL,
9475         },
9476         {
9477                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
9478                 .doit = nl80211_crit_protocol_start,
9479                 .policy = nl80211_policy,
9480                 .flags = GENL_ADMIN_PERM,
9481                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9482                                   NL80211_FLAG_NEED_RTNL,
9483         },
9484         {
9485                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
9486                 .doit = nl80211_crit_protocol_stop,
9487                 .policy = nl80211_policy,
9488                 .flags = GENL_ADMIN_PERM,
9489                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9490                                   NL80211_FLAG_NEED_RTNL,
9491         },
9492         {
9493                 .cmd = NL80211_CMD_GET_COALESCE,
9494                 .doit = nl80211_get_coalesce,
9495                 .policy = nl80211_policy,
9496                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9497                                   NL80211_FLAG_NEED_RTNL,
9498         },
9499         {
9500                 .cmd = NL80211_CMD_SET_COALESCE,
9501                 .doit = nl80211_set_coalesce,
9502                 .policy = nl80211_policy,
9503                 .flags = GENL_ADMIN_PERM,
9504                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9505                                   NL80211_FLAG_NEED_RTNL,
9506         },
9507         {
9508                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
9509                 .doit = nl80211_channel_switch,
9510                 .policy = nl80211_policy,
9511                 .flags = GENL_ADMIN_PERM,
9512                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9513                                   NL80211_FLAG_NEED_RTNL,
9514         },
9515 };
9516
9517 static struct genl_multicast_group nl80211_mlme_mcgrp = {
9518         .name = "mlme",
9519 };
9520
9521 /* multicast groups */
9522 static struct genl_multicast_group nl80211_config_mcgrp = {
9523         .name = "config",
9524 };
9525 static struct genl_multicast_group nl80211_scan_mcgrp = {
9526         .name = "scan",
9527 };
9528 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
9529         .name = "regulatory",
9530 };
9531
9532 /* notification functions */
9533
9534 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9535 {
9536         struct sk_buff *msg;
9537         struct nl80211_dump_wiphy_state state = {};
9538
9539         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9540         if (!msg)
9541                 return;
9542
9543         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0, &state) < 0) {
9544                 nlmsg_free(msg);
9545                 return;
9546         }
9547
9548         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9549                                 nl80211_config_mcgrp.id, GFP_KERNEL);
9550 }
9551
9552 static int nl80211_add_scan_req(struct sk_buff *msg,
9553                                 struct cfg80211_registered_device *rdev)
9554 {
9555         struct cfg80211_scan_request *req = rdev->scan_req;
9556         struct nlattr *nest;
9557         int i;
9558
9559         if (WARN_ON(!req))
9560                 return 0;
9561
9562         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9563         if (!nest)
9564                 goto nla_put_failure;
9565         for (i = 0; i < req->n_ssids; i++) {
9566                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9567                         goto nla_put_failure;
9568         }
9569         nla_nest_end(msg, nest);
9570
9571         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9572         if (!nest)
9573                 goto nla_put_failure;
9574         for (i = 0; i < req->n_channels; i++) {
9575                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9576                         goto nla_put_failure;
9577         }
9578         nla_nest_end(msg, nest);
9579
9580         if (req->ie &&
9581             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9582                 goto nla_put_failure;
9583
9584         if (req->flags)
9585                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
9586
9587         return 0;
9588  nla_put_failure:
9589         return -ENOBUFS;
9590 }
9591
9592 static int nl80211_send_scan_msg(struct sk_buff *msg,
9593                                  struct cfg80211_registered_device *rdev,
9594                                  struct wireless_dev *wdev,
9595                                  u32 portid, u32 seq, int flags,
9596                                  u32 cmd)
9597 {
9598         void *hdr;
9599
9600         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9601         if (!hdr)
9602                 return -1;
9603
9604         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9605             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9606                                          wdev->netdev->ifindex)) ||
9607             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9608                 goto nla_put_failure;
9609
9610         /* ignore errors and send incomplete event anyway */
9611         nl80211_add_scan_req(msg, rdev);
9612
9613         return genlmsg_end(msg, hdr);
9614
9615  nla_put_failure:
9616         genlmsg_cancel(msg, hdr);
9617         return -EMSGSIZE;
9618 }
9619
9620 static int
9621 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9622                             struct cfg80211_registered_device *rdev,
9623                             struct net_device *netdev,
9624                             u32 portid, u32 seq, int flags, u32 cmd)
9625 {
9626         void *hdr;
9627
9628         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9629         if (!hdr)
9630                 return -1;
9631
9632         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9633             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9634                 goto nla_put_failure;
9635
9636         return genlmsg_end(msg, hdr);
9637
9638  nla_put_failure:
9639         genlmsg_cancel(msg, hdr);
9640         return -EMSGSIZE;
9641 }
9642
9643 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9644                              struct wireless_dev *wdev)
9645 {
9646         struct sk_buff *msg;
9647
9648         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9649         if (!msg)
9650                 return;
9651
9652         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9653                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9654                 nlmsg_free(msg);
9655                 return;
9656         }
9657
9658         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9659                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9660 }
9661
9662 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9663                             struct wireless_dev *wdev)
9664 {
9665         struct sk_buff *msg;
9666
9667         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9668         if (!msg)
9669                 return;
9670
9671         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9672                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9673                 nlmsg_free(msg);
9674                 return;
9675         }
9676
9677         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9678                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9679 }
9680
9681 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9682                                struct wireless_dev *wdev)
9683 {
9684         struct sk_buff *msg;
9685
9686         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9687         if (!msg)
9688                 return;
9689
9690         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9691                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9692                 nlmsg_free(msg);
9693                 return;
9694         }
9695
9696         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9697                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9698 }
9699
9700 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9701                                      struct net_device *netdev)
9702 {
9703         struct sk_buff *msg;
9704
9705         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9706         if (!msg)
9707                 return;
9708
9709         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9710                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9711                 nlmsg_free(msg);
9712                 return;
9713         }
9714
9715         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9716                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9717 }
9718
9719 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9720                              struct net_device *netdev, u32 cmd)
9721 {
9722         struct sk_buff *msg;
9723
9724         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9725         if (!msg)
9726                 return;
9727
9728         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9729                 nlmsg_free(msg);
9730                 return;
9731         }
9732
9733         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9734                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9735 }
9736
9737 /*
9738  * This can happen on global regulatory changes or device specific settings
9739  * based on custom world regulatory domains.
9740  */
9741 void nl80211_send_reg_change_event(struct regulatory_request *request)
9742 {
9743         struct sk_buff *msg;
9744         void *hdr;
9745
9746         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9747         if (!msg)
9748                 return;
9749
9750         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9751         if (!hdr) {
9752                 nlmsg_free(msg);
9753                 return;
9754         }
9755
9756         /* Userspace can always count this one always being set */
9757         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9758                 goto nla_put_failure;
9759
9760         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9761                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9762                                NL80211_REGDOM_TYPE_WORLD))
9763                         goto nla_put_failure;
9764         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9765                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9766                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9767                         goto nla_put_failure;
9768         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9769                    request->intersect) {
9770                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9771                                NL80211_REGDOM_TYPE_INTERSECTION))
9772                         goto nla_put_failure;
9773         } else {
9774                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9775                                NL80211_REGDOM_TYPE_COUNTRY) ||
9776                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9777                                    request->alpha2))
9778                         goto nla_put_failure;
9779         }
9780
9781         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9782             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9783                 goto nla_put_failure;
9784
9785         genlmsg_end(msg, hdr);
9786
9787         rcu_read_lock();
9788         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9789                                 GFP_ATOMIC);
9790         rcu_read_unlock();
9791
9792         return;
9793
9794 nla_put_failure:
9795         genlmsg_cancel(msg, hdr);
9796         nlmsg_free(msg);
9797 }
9798
9799 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9800                                     struct net_device *netdev,
9801                                     const u8 *buf, size_t len,
9802                                     enum nl80211_commands cmd, gfp_t gfp)
9803 {
9804         struct sk_buff *msg;
9805         void *hdr;
9806
9807         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9808         if (!msg)
9809                 return;
9810
9811         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9812         if (!hdr) {
9813                 nlmsg_free(msg);
9814                 return;
9815         }
9816
9817         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9818             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9819             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9820                 goto nla_put_failure;
9821
9822         genlmsg_end(msg, hdr);
9823
9824         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9825                                 nl80211_mlme_mcgrp.id, gfp);
9826         return;
9827
9828  nla_put_failure:
9829         genlmsg_cancel(msg, hdr);
9830         nlmsg_free(msg);
9831 }
9832
9833 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9834                           struct net_device *netdev, const u8 *buf,
9835                           size_t len, gfp_t gfp)
9836 {
9837         nl80211_send_mlme_event(rdev, netdev, buf, len,
9838                                 NL80211_CMD_AUTHENTICATE, gfp);
9839 }
9840
9841 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9842                            struct net_device *netdev, const u8 *buf,
9843                            size_t len, gfp_t gfp)
9844 {
9845         nl80211_send_mlme_event(rdev, netdev, buf, len,
9846                                 NL80211_CMD_ASSOCIATE, gfp);
9847 }
9848
9849 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9850                          struct net_device *netdev, const u8 *buf,
9851                          size_t len, gfp_t gfp)
9852 {
9853         nl80211_send_mlme_event(rdev, netdev, buf, len,
9854                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9855 }
9856
9857 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9858                            struct net_device *netdev, const u8 *buf,
9859                            size_t len, gfp_t gfp)
9860 {
9861         nl80211_send_mlme_event(rdev, netdev, buf, len,
9862                                 NL80211_CMD_DISASSOCIATE, gfp);
9863 }
9864
9865 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
9866                                   size_t len)
9867 {
9868         struct wireless_dev *wdev = dev->ieee80211_ptr;
9869         struct wiphy *wiphy = wdev->wiphy;
9870         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9871         const struct ieee80211_mgmt *mgmt = (void *)buf;
9872         u32 cmd;
9873
9874         if (WARN_ON(len < 2))
9875                 return;
9876
9877         if (ieee80211_is_deauth(mgmt->frame_control))
9878                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
9879         else
9880                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
9881
9882         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
9883         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
9884 }
9885 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
9886
9887 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9888                                       struct net_device *netdev, int cmd,
9889                                       const u8 *addr, gfp_t gfp)
9890 {
9891         struct sk_buff *msg;
9892         void *hdr;
9893
9894         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9895         if (!msg)
9896                 return;
9897
9898         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9899         if (!hdr) {
9900                 nlmsg_free(msg);
9901                 return;
9902         }
9903
9904         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9905             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9906             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9907             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9908                 goto nla_put_failure;
9909
9910         genlmsg_end(msg, hdr);
9911
9912         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9913                                 nl80211_mlme_mcgrp.id, gfp);
9914         return;
9915
9916  nla_put_failure:
9917         genlmsg_cancel(msg, hdr);
9918         nlmsg_free(msg);
9919 }
9920
9921 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9922                                struct net_device *netdev, const u8 *addr,
9923                                gfp_t gfp)
9924 {
9925         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9926                                   addr, gfp);
9927 }
9928
9929 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9930                                 struct net_device *netdev, const u8 *addr,
9931                                 gfp_t gfp)
9932 {
9933         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9934                                   addr, gfp);
9935 }
9936
9937 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9938                                  struct net_device *netdev, const u8 *bssid,
9939                                  const u8 *req_ie, size_t req_ie_len,
9940                                  const u8 *resp_ie, size_t resp_ie_len,
9941                                  u16 status, gfp_t gfp)
9942 {
9943         struct sk_buff *msg;
9944         void *hdr;
9945
9946         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9947         if (!msg)
9948                 return;
9949
9950         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9951         if (!hdr) {
9952                 nlmsg_free(msg);
9953                 return;
9954         }
9955
9956         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9957             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9958             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9959             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9960             (req_ie &&
9961              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9962             (resp_ie &&
9963              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9964                 goto nla_put_failure;
9965
9966         genlmsg_end(msg, hdr);
9967
9968         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9969                                 nl80211_mlme_mcgrp.id, gfp);
9970         return;
9971
9972  nla_put_failure:
9973         genlmsg_cancel(msg, hdr);
9974         nlmsg_free(msg);
9975
9976 }
9977
9978 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9979                          struct net_device *netdev, const u8 *bssid,
9980                          const u8 *req_ie, size_t req_ie_len,
9981                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
9982 {
9983         struct sk_buff *msg;
9984         void *hdr;
9985
9986         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9987         if (!msg)
9988                 return;
9989
9990         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
9991         if (!hdr) {
9992                 nlmsg_free(msg);
9993                 return;
9994         }
9995
9996         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9997             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9998             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9999             (req_ie &&
10000              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10001             (resp_ie &&
10002              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10003                 goto nla_put_failure;
10004
10005         genlmsg_end(msg, hdr);
10006
10007         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10008                                 nl80211_mlme_mcgrp.id, gfp);
10009         return;
10010
10011  nla_put_failure:
10012         genlmsg_cancel(msg, hdr);
10013         nlmsg_free(msg);
10014
10015 }
10016
10017 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10018                                struct net_device *netdev, u16 reason,
10019                                const u8 *ie, size_t ie_len, bool from_ap)
10020 {
10021         struct sk_buff *msg;
10022         void *hdr;
10023
10024         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10025         if (!msg)
10026                 return;
10027
10028         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10029         if (!hdr) {
10030                 nlmsg_free(msg);
10031                 return;
10032         }
10033
10034         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10035             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10036             (from_ap && reason &&
10037              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10038             (from_ap &&
10039              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10040             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10041                 goto nla_put_failure;
10042
10043         genlmsg_end(msg, hdr);
10044
10045         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10046                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10047         return;
10048
10049  nla_put_failure:
10050         genlmsg_cancel(msg, hdr);
10051         nlmsg_free(msg);
10052
10053 }
10054
10055 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10056                              struct net_device *netdev, const u8 *bssid,
10057                              gfp_t gfp)
10058 {
10059         struct sk_buff *msg;
10060         void *hdr;
10061
10062         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10063         if (!msg)
10064                 return;
10065
10066         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10067         if (!hdr) {
10068                 nlmsg_free(msg);
10069                 return;
10070         }
10071
10072         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10073             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10074             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10075                 goto nla_put_failure;
10076
10077         genlmsg_end(msg, hdr);
10078
10079         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10080                                 nl80211_mlme_mcgrp.id, gfp);
10081         return;
10082
10083  nla_put_failure:
10084         genlmsg_cancel(msg, hdr);
10085         nlmsg_free(msg);
10086 }
10087
10088 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10089                                         const u8* ie, u8 ie_len, gfp_t gfp)
10090 {
10091         struct wireless_dev *wdev = dev->ieee80211_ptr;
10092         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10093         struct sk_buff *msg;
10094         void *hdr;
10095
10096         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10097                 return;
10098
10099         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10100
10101         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10102         if (!msg)
10103                 return;
10104
10105         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10106         if (!hdr) {
10107                 nlmsg_free(msg);
10108                 return;
10109         }
10110
10111         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10112             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10113             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10114             (ie_len && ie &&
10115              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10116                 goto nla_put_failure;
10117
10118         genlmsg_end(msg, hdr);
10119
10120         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10121                                 nl80211_mlme_mcgrp.id, gfp);
10122         return;
10123
10124  nla_put_failure:
10125         genlmsg_cancel(msg, hdr);
10126         nlmsg_free(msg);
10127 }
10128 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10129
10130 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10131                                  struct net_device *netdev, const u8 *addr,
10132                                  enum nl80211_key_type key_type, int key_id,
10133                                  const u8 *tsc, gfp_t gfp)
10134 {
10135         struct sk_buff *msg;
10136         void *hdr;
10137
10138         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10139         if (!msg)
10140                 return;
10141
10142         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10143         if (!hdr) {
10144                 nlmsg_free(msg);
10145                 return;
10146         }
10147
10148         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10149             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10150             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10151             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10152             (key_id != -1 &&
10153              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10154             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10155                 goto nla_put_failure;
10156
10157         genlmsg_end(msg, hdr);
10158
10159         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10160                                 nl80211_mlme_mcgrp.id, gfp);
10161         return;
10162
10163  nla_put_failure:
10164         genlmsg_cancel(msg, hdr);
10165         nlmsg_free(msg);
10166 }
10167
10168 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10169                                     struct ieee80211_channel *channel_before,
10170                                     struct ieee80211_channel *channel_after)
10171 {
10172         struct sk_buff *msg;
10173         void *hdr;
10174         struct nlattr *nl_freq;
10175
10176         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10177         if (!msg)
10178                 return;
10179
10180         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10181         if (!hdr) {
10182                 nlmsg_free(msg);
10183                 return;
10184         }
10185
10186         /*
10187          * Since we are applying the beacon hint to a wiphy we know its
10188          * wiphy_idx is valid
10189          */
10190         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10191                 goto nla_put_failure;
10192
10193         /* Before */
10194         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10195         if (!nl_freq)
10196                 goto nla_put_failure;
10197         if (nl80211_msg_put_channel(msg, channel_before, false))
10198                 goto nla_put_failure;
10199         nla_nest_end(msg, nl_freq);
10200
10201         /* After */
10202         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10203         if (!nl_freq)
10204                 goto nla_put_failure;
10205         if (nl80211_msg_put_channel(msg, channel_after, false))
10206                 goto nla_put_failure;
10207         nla_nest_end(msg, nl_freq);
10208
10209         genlmsg_end(msg, hdr);
10210
10211         rcu_read_lock();
10212         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
10213                                 GFP_ATOMIC);
10214         rcu_read_unlock();
10215
10216         return;
10217
10218 nla_put_failure:
10219         genlmsg_cancel(msg, hdr);
10220         nlmsg_free(msg);
10221 }
10222
10223 static void nl80211_send_remain_on_chan_event(
10224         int cmd, struct cfg80211_registered_device *rdev,
10225         struct wireless_dev *wdev, u64 cookie,
10226         struct ieee80211_channel *chan,
10227         unsigned int duration, gfp_t gfp)
10228 {
10229         struct sk_buff *msg;
10230         void *hdr;
10231
10232         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10233         if (!msg)
10234                 return;
10235
10236         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10237         if (!hdr) {
10238                 nlmsg_free(msg);
10239                 return;
10240         }
10241
10242         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10243             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10244                                          wdev->netdev->ifindex)) ||
10245             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10246             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10247             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10248                         NL80211_CHAN_NO_HT) ||
10249             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10250                 goto nla_put_failure;
10251
10252         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10253             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
10254                 goto nla_put_failure;
10255
10256         genlmsg_end(msg, hdr);
10257
10258         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10259                                 nl80211_mlme_mcgrp.id, gfp);
10260         return;
10261
10262  nla_put_failure:
10263         genlmsg_cancel(msg, hdr);
10264         nlmsg_free(msg);
10265 }
10266
10267 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10268                                struct ieee80211_channel *chan,
10269                                unsigned int duration, gfp_t gfp)
10270 {
10271         struct wiphy *wiphy = wdev->wiphy;
10272         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10273
10274         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10275         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10276                                           rdev, wdev, cookie, chan,
10277                                           duration, gfp);
10278 }
10279 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10280
10281 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10282                                         struct ieee80211_channel *chan,
10283                                         gfp_t gfp)
10284 {
10285         struct wiphy *wiphy = wdev->wiphy;
10286         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10287
10288         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
10289         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10290                                           rdev, wdev, cookie, chan, 0, gfp);
10291 }
10292 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10293
10294 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10295                       struct station_info *sinfo, gfp_t gfp)
10296 {
10297         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10298         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10299         struct sk_buff *msg;
10300
10301         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10302
10303         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10304         if (!msg)
10305                 return;
10306
10307         if (nl80211_send_station(msg, 0, 0, 0,
10308                                  rdev, dev, mac_addr, sinfo) < 0) {
10309                 nlmsg_free(msg);
10310                 return;
10311         }
10312
10313         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10314                                 nl80211_mlme_mcgrp.id, gfp);
10315 }
10316 EXPORT_SYMBOL(cfg80211_new_sta);
10317
10318 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10319 {
10320         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10321         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10322         struct sk_buff *msg;
10323         void *hdr;
10324
10325         trace_cfg80211_del_sta(dev, mac_addr);
10326
10327         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10328         if (!msg)
10329                 return;
10330
10331         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10332         if (!hdr) {
10333                 nlmsg_free(msg);
10334                 return;
10335         }
10336
10337         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10338             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10339                 goto nla_put_failure;
10340
10341         genlmsg_end(msg, hdr);
10342
10343         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10344                                 nl80211_mlme_mcgrp.id, gfp);
10345         return;
10346
10347  nla_put_failure:
10348         genlmsg_cancel(msg, hdr);
10349         nlmsg_free(msg);
10350 }
10351 EXPORT_SYMBOL(cfg80211_del_sta);
10352
10353 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10354                           enum nl80211_connect_failed_reason reason,
10355                           gfp_t gfp)
10356 {
10357         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10358         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10359         struct sk_buff *msg;
10360         void *hdr;
10361
10362         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10363         if (!msg)
10364                 return;
10365
10366         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10367         if (!hdr) {
10368                 nlmsg_free(msg);
10369                 return;
10370         }
10371
10372         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10373             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10374             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10375                 goto nla_put_failure;
10376
10377         genlmsg_end(msg, hdr);
10378
10379         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10380                                 nl80211_mlme_mcgrp.id, gfp);
10381         return;
10382
10383  nla_put_failure:
10384         genlmsg_cancel(msg, hdr);
10385         nlmsg_free(msg);
10386 }
10387 EXPORT_SYMBOL(cfg80211_conn_failed);
10388
10389 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10390                                        const u8 *addr, gfp_t gfp)
10391 {
10392         struct wireless_dev *wdev = dev->ieee80211_ptr;
10393         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10394         struct sk_buff *msg;
10395         void *hdr;
10396         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10397
10398         if (!nlportid)
10399                 return false;
10400
10401         msg = nlmsg_new(100, gfp);
10402         if (!msg)
10403                 return true;
10404
10405         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10406         if (!hdr) {
10407                 nlmsg_free(msg);
10408                 return true;
10409         }
10410
10411         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10412             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10413             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10414                 goto nla_put_failure;
10415
10416         genlmsg_end(msg, hdr);
10417         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10418         return true;
10419
10420  nla_put_failure:
10421         genlmsg_cancel(msg, hdr);
10422         nlmsg_free(msg);
10423         return true;
10424 }
10425
10426 bool cfg80211_rx_spurious_frame(struct net_device *dev,
10427                                 const u8 *addr, gfp_t gfp)
10428 {
10429         struct wireless_dev *wdev = dev->ieee80211_ptr;
10430         bool ret;
10431
10432         trace_cfg80211_rx_spurious_frame(dev, addr);
10433
10434         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10435                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
10436                 trace_cfg80211_return_bool(false);
10437                 return false;
10438         }
10439         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
10440                                          addr, gfp);
10441         trace_cfg80211_return_bool(ret);
10442         return ret;
10443 }
10444 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
10445
10446 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
10447                                         const u8 *addr, gfp_t gfp)
10448 {
10449         struct wireless_dev *wdev = dev->ieee80211_ptr;
10450         bool ret;
10451
10452         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
10453
10454         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10455                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10456                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
10457                 trace_cfg80211_return_bool(false);
10458                 return false;
10459         }
10460         ret = __nl80211_unexpected_frame(dev,
10461                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
10462                                          addr, gfp);
10463         trace_cfg80211_return_bool(ret);
10464         return ret;
10465 }
10466 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
10467
10468 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
10469                       struct wireless_dev *wdev, u32 nlportid,
10470                       int freq, int sig_dbm,
10471                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
10472 {
10473         struct net_device *netdev = wdev->netdev;
10474         struct sk_buff *msg;
10475         void *hdr;
10476
10477         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10478         if (!msg)
10479                 return -ENOMEM;
10480
10481         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10482         if (!hdr) {
10483                 nlmsg_free(msg);
10484                 return -ENOMEM;
10485         }
10486
10487         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10488             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10489                                         netdev->ifindex)) ||
10490             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10491             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
10492             (sig_dbm &&
10493              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10494             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10495             (flags &&
10496              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
10497                 goto nla_put_failure;
10498
10499         genlmsg_end(msg, hdr);
10500
10501         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10502
10503  nla_put_failure:
10504         genlmsg_cancel(msg, hdr);
10505         nlmsg_free(msg);
10506         return -ENOBUFS;
10507 }
10508
10509 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
10510                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
10511 {
10512         struct wiphy *wiphy = wdev->wiphy;
10513         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10514         struct net_device *netdev = wdev->netdev;
10515         struct sk_buff *msg;
10516         void *hdr;
10517
10518         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10519
10520         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10521         if (!msg)
10522                 return;
10523
10524         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10525         if (!hdr) {
10526                 nlmsg_free(msg);
10527                 return;
10528         }
10529
10530         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10531             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10532                                    netdev->ifindex)) ||
10533             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10534             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10535             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10536             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10537                 goto nla_put_failure;
10538
10539         genlmsg_end(msg, hdr);
10540
10541         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10542                                 nl80211_mlme_mcgrp.id, gfp);
10543         return;
10544
10545  nla_put_failure:
10546         genlmsg_cancel(msg, hdr);
10547         nlmsg_free(msg);
10548 }
10549 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10550
10551 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10552                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10553                               gfp_t gfp)
10554 {
10555         struct wireless_dev *wdev = dev->ieee80211_ptr;
10556         struct wiphy *wiphy = wdev->wiphy;
10557         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10558         struct sk_buff *msg;
10559         struct nlattr *pinfoattr;
10560         void *hdr;
10561
10562         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10563
10564         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10565         if (!msg)
10566                 return;
10567
10568         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10569         if (!hdr) {
10570                 nlmsg_free(msg);
10571                 return;
10572         }
10573
10574         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10575             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10576                 goto nla_put_failure;
10577
10578         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10579         if (!pinfoattr)
10580                 goto nla_put_failure;
10581
10582         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10583                         rssi_event))
10584                 goto nla_put_failure;
10585
10586         nla_nest_end(msg, pinfoattr);
10587
10588         genlmsg_end(msg, hdr);
10589
10590         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10591                                 nl80211_mlme_mcgrp.id, gfp);
10592         return;
10593
10594  nla_put_failure:
10595         genlmsg_cancel(msg, hdr);
10596         nlmsg_free(msg);
10597 }
10598 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10599
10600 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10601                                      struct net_device *netdev, const u8 *bssid,
10602                                      const u8 *replay_ctr, gfp_t gfp)
10603 {
10604         struct sk_buff *msg;
10605         struct nlattr *rekey_attr;
10606         void *hdr;
10607
10608         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10609         if (!msg)
10610                 return;
10611
10612         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10613         if (!hdr) {
10614                 nlmsg_free(msg);
10615                 return;
10616         }
10617
10618         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10619             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10620             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10621                 goto nla_put_failure;
10622
10623         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10624         if (!rekey_attr)
10625                 goto nla_put_failure;
10626
10627         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10628                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10629                 goto nla_put_failure;
10630
10631         nla_nest_end(msg, rekey_attr);
10632
10633         genlmsg_end(msg, hdr);
10634
10635         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10636                                 nl80211_mlme_mcgrp.id, gfp);
10637         return;
10638
10639  nla_put_failure:
10640         genlmsg_cancel(msg, hdr);
10641         nlmsg_free(msg);
10642 }
10643
10644 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10645                                const u8 *replay_ctr, gfp_t gfp)
10646 {
10647         struct wireless_dev *wdev = dev->ieee80211_ptr;
10648         struct wiphy *wiphy = wdev->wiphy;
10649         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10650
10651         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10652         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10653 }
10654 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10655
10656 static void
10657 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10658                                struct net_device *netdev, int index,
10659                                const u8 *bssid, bool preauth, gfp_t gfp)
10660 {
10661         struct sk_buff *msg;
10662         struct nlattr *attr;
10663         void *hdr;
10664
10665         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10666         if (!msg)
10667                 return;
10668
10669         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10670         if (!hdr) {
10671                 nlmsg_free(msg);
10672                 return;
10673         }
10674
10675         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10676             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10677                 goto nla_put_failure;
10678
10679         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10680         if (!attr)
10681                 goto nla_put_failure;
10682
10683         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10684             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10685             (preauth &&
10686              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10687                 goto nla_put_failure;
10688
10689         nla_nest_end(msg, attr);
10690
10691         genlmsg_end(msg, hdr);
10692
10693         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10694                                 nl80211_mlme_mcgrp.id, gfp);
10695         return;
10696
10697  nla_put_failure:
10698         genlmsg_cancel(msg, hdr);
10699         nlmsg_free(msg);
10700 }
10701
10702 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10703                                      const u8 *bssid, bool preauth, gfp_t gfp)
10704 {
10705         struct wireless_dev *wdev = dev->ieee80211_ptr;
10706         struct wiphy *wiphy = wdev->wiphy;
10707         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10708
10709         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10710         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10711 }
10712 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10713
10714 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10715                                      struct net_device *netdev,
10716                                      struct cfg80211_chan_def *chandef,
10717                                      gfp_t gfp)
10718 {
10719         struct sk_buff *msg;
10720         void *hdr;
10721
10722         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10723         if (!msg)
10724                 return;
10725
10726         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10727         if (!hdr) {
10728                 nlmsg_free(msg);
10729                 return;
10730         }
10731
10732         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10733                 goto nla_put_failure;
10734
10735         if (nl80211_send_chandef(msg, chandef))
10736                 goto nla_put_failure;
10737
10738         genlmsg_end(msg, hdr);
10739
10740         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10741                                 nl80211_mlme_mcgrp.id, gfp);
10742         return;
10743
10744  nla_put_failure:
10745         genlmsg_cancel(msg, hdr);
10746         nlmsg_free(msg);
10747 }
10748
10749 void cfg80211_ch_switch_notify(struct net_device *dev,
10750                                struct cfg80211_chan_def *chandef)
10751 {
10752         struct wireless_dev *wdev = dev->ieee80211_ptr;
10753         struct wiphy *wiphy = wdev->wiphy;
10754         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10755
10756         trace_cfg80211_ch_switch_notify(dev, chandef);
10757
10758         wdev_lock(wdev);
10759
10760         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10761                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10762                     wdev->iftype != NL80211_IFTYPE_ADHOC))
10763                 goto out;
10764
10765         wdev->channel = chandef->chan;
10766         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10767 out:
10768         wdev_unlock(wdev);
10769         return;
10770 }
10771 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10772
10773 void cfg80211_cqm_txe_notify(struct net_device *dev,
10774                              const u8 *peer, u32 num_packets,
10775                              u32 rate, u32 intvl, gfp_t gfp)
10776 {
10777         struct wireless_dev *wdev = dev->ieee80211_ptr;
10778         struct wiphy *wiphy = wdev->wiphy;
10779         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10780         struct sk_buff *msg;
10781         struct nlattr *pinfoattr;
10782         void *hdr;
10783
10784         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10785         if (!msg)
10786                 return;
10787
10788         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10789         if (!hdr) {
10790                 nlmsg_free(msg);
10791                 return;
10792         }
10793
10794         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10795             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10796             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10797                 goto nla_put_failure;
10798
10799         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10800         if (!pinfoattr)
10801                 goto nla_put_failure;
10802
10803         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10804                 goto nla_put_failure;
10805
10806         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10807                 goto nla_put_failure;
10808
10809         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10810                 goto nla_put_failure;
10811
10812         nla_nest_end(msg, pinfoattr);
10813
10814         genlmsg_end(msg, hdr);
10815
10816         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10817                                 nl80211_mlme_mcgrp.id, gfp);
10818         return;
10819
10820  nla_put_failure:
10821         genlmsg_cancel(msg, hdr);
10822         nlmsg_free(msg);
10823 }
10824 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10825
10826 void
10827 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10828                      struct cfg80211_chan_def *chandef,
10829                      enum nl80211_radar_event event,
10830                      struct net_device *netdev, gfp_t gfp)
10831 {
10832         struct sk_buff *msg;
10833         void *hdr;
10834
10835         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10836         if (!msg)
10837                 return;
10838
10839         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10840         if (!hdr) {
10841                 nlmsg_free(msg);
10842                 return;
10843         }
10844
10845         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10846                 goto nla_put_failure;
10847
10848         /* NOP and radar events don't need a netdev parameter */
10849         if (netdev) {
10850                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10851
10852                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10853                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10854                         goto nla_put_failure;
10855         }
10856
10857         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10858                 goto nla_put_failure;
10859
10860         if (nl80211_send_chandef(msg, chandef))
10861                 goto nla_put_failure;
10862
10863         genlmsg_end(msg, hdr);
10864
10865         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10866                                 nl80211_mlme_mcgrp.id, gfp);
10867         return;
10868
10869  nla_put_failure:
10870         genlmsg_cancel(msg, hdr);
10871         nlmsg_free(msg);
10872 }
10873
10874 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10875                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10876 {
10877         struct wireless_dev *wdev = dev->ieee80211_ptr;
10878         struct wiphy *wiphy = wdev->wiphy;
10879         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10880         struct sk_buff *msg;
10881         struct nlattr *pinfoattr;
10882         void *hdr;
10883
10884         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10885
10886         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10887         if (!msg)
10888                 return;
10889
10890         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10891         if (!hdr) {
10892                 nlmsg_free(msg);
10893                 return;
10894         }
10895
10896         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10897             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10898             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10899                 goto nla_put_failure;
10900
10901         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10902         if (!pinfoattr)
10903                 goto nla_put_failure;
10904
10905         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10906                 goto nla_put_failure;
10907
10908         nla_nest_end(msg, pinfoattr);
10909
10910         genlmsg_end(msg, hdr);
10911
10912         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10913                                 nl80211_mlme_mcgrp.id, gfp);
10914         return;
10915
10916  nla_put_failure:
10917         genlmsg_cancel(msg, hdr);
10918         nlmsg_free(msg);
10919 }
10920 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10921
10922 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10923                            u64 cookie, bool acked, gfp_t gfp)
10924 {
10925         struct wireless_dev *wdev = dev->ieee80211_ptr;
10926         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10927         struct sk_buff *msg;
10928         void *hdr;
10929
10930         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10931
10932         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10933
10934         if (!msg)
10935                 return;
10936
10937         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10938         if (!hdr) {
10939                 nlmsg_free(msg);
10940                 return;
10941         }
10942
10943         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10944             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10945             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10946             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10947             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10948                 goto nla_put_failure;
10949
10950         genlmsg_end(msg, hdr);
10951
10952         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10953                                 nl80211_mlme_mcgrp.id, gfp);
10954         return;
10955
10956  nla_put_failure:
10957         genlmsg_cancel(msg, hdr);
10958         nlmsg_free(msg);
10959 }
10960 EXPORT_SYMBOL(cfg80211_probe_status);
10961
10962 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10963                                  const u8 *frame, size_t len,
10964                                  int freq, int sig_dbm)
10965 {
10966         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10967         struct sk_buff *msg;
10968         void *hdr;
10969         struct cfg80211_beacon_registration *reg;
10970
10971         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10972
10973         spin_lock_bh(&rdev->beacon_registrations_lock);
10974         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10975                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10976                 if (!msg) {
10977                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10978                         return;
10979                 }
10980
10981                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10982                 if (!hdr)
10983                         goto nla_put_failure;
10984
10985                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10986                     (freq &&
10987                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10988                     (sig_dbm &&
10989                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10990                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10991                         goto nla_put_failure;
10992
10993                 genlmsg_end(msg, hdr);
10994
10995                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10996         }
10997         spin_unlock_bh(&rdev->beacon_registrations_lock);
10998         return;
10999
11000  nla_put_failure:
11001         spin_unlock_bh(&rdev->beacon_registrations_lock);
11002         if (hdr)
11003                 genlmsg_cancel(msg, hdr);
11004         nlmsg_free(msg);
11005 }
11006 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11007
11008 #ifdef CONFIG_PM
11009 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11010                                    struct cfg80211_wowlan_wakeup *wakeup,
11011                                    gfp_t gfp)
11012 {
11013         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11014         struct sk_buff *msg;
11015         void *hdr;
11016         int size = 200;
11017
11018         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11019
11020         if (wakeup)
11021                 size += wakeup->packet_present_len;
11022
11023         msg = nlmsg_new(size, gfp);
11024         if (!msg)
11025                 return;
11026
11027         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11028         if (!hdr)
11029                 goto free_msg;
11030
11031         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11032             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11033                 goto free_msg;
11034
11035         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11036                                         wdev->netdev->ifindex))
11037                 goto free_msg;
11038
11039         if (wakeup) {
11040                 struct nlattr *reasons;
11041
11042                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11043
11044                 if (wakeup->disconnect &&
11045                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11046                         goto free_msg;
11047                 if (wakeup->magic_pkt &&
11048                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11049                         goto free_msg;
11050                 if (wakeup->gtk_rekey_failure &&
11051                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11052                         goto free_msg;
11053                 if (wakeup->eap_identity_req &&
11054                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11055                         goto free_msg;
11056                 if (wakeup->four_way_handshake &&
11057                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11058                         goto free_msg;
11059                 if (wakeup->rfkill_release &&
11060                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11061                         goto free_msg;
11062
11063                 if (wakeup->pattern_idx >= 0 &&
11064                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11065                                 wakeup->pattern_idx))
11066                         goto free_msg;
11067
11068                 if (wakeup->tcp_match)
11069                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
11070
11071                 if (wakeup->tcp_connlost)
11072                         nla_put_flag(msg,
11073                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
11074
11075                 if (wakeup->tcp_nomoretokens)
11076                         nla_put_flag(msg,
11077                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
11078
11079                 if (wakeup->packet) {
11080                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11081                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11082
11083                         if (!wakeup->packet_80211) {
11084                                 pkt_attr =
11085                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11086                                 len_attr =
11087                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11088                         }
11089
11090                         if (wakeup->packet_len &&
11091                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11092                                 goto free_msg;
11093
11094                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11095                                     wakeup->packet))
11096                                 goto free_msg;
11097                 }
11098
11099                 nla_nest_end(msg, reasons);
11100         }
11101
11102         genlmsg_end(msg, hdr);
11103
11104         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11105                                 nl80211_mlme_mcgrp.id, gfp);
11106         return;
11107
11108  free_msg:
11109         nlmsg_free(msg);
11110 }
11111 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11112 #endif
11113
11114 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11115                                 enum nl80211_tdls_operation oper,
11116                                 u16 reason_code, gfp_t gfp)
11117 {
11118         struct wireless_dev *wdev = dev->ieee80211_ptr;
11119         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11120         struct sk_buff *msg;
11121         void *hdr;
11122
11123         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11124                                          reason_code);
11125
11126         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11127         if (!msg)
11128                 return;
11129
11130         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11131         if (!hdr) {
11132                 nlmsg_free(msg);
11133                 return;
11134         }
11135
11136         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11137             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11138             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11139             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11140             (reason_code > 0 &&
11141              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11142                 goto nla_put_failure;
11143
11144         genlmsg_end(msg, hdr);
11145
11146         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11147                                 nl80211_mlme_mcgrp.id, gfp);
11148         return;
11149
11150  nla_put_failure:
11151         genlmsg_cancel(msg, hdr);
11152         nlmsg_free(msg);
11153 }
11154 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11155
11156 static int nl80211_netlink_notify(struct notifier_block * nb,
11157                                   unsigned long state,
11158                                   void *_notify)
11159 {
11160         struct netlink_notify *notify = _notify;
11161         struct cfg80211_registered_device *rdev;
11162         struct wireless_dev *wdev;
11163         struct cfg80211_beacon_registration *reg, *tmp;
11164
11165         if (state != NETLINK_URELEASE)
11166                 return NOTIFY_DONE;
11167
11168         rcu_read_lock();
11169
11170         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11171                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
11172                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11173
11174                 spin_lock_bh(&rdev->beacon_registrations_lock);
11175                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11176                                          list) {
11177                         if (reg->nlportid == notify->portid) {
11178                                 list_del(&reg->list);
11179                                 kfree(reg);
11180                                 break;
11181                         }
11182                 }
11183                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11184         }
11185
11186         rcu_read_unlock();
11187
11188         return NOTIFY_DONE;
11189 }
11190
11191 static struct notifier_block nl80211_netlink_notifier = {
11192         .notifier_call = nl80211_netlink_notify,
11193 };
11194
11195 void cfg80211_ft_event(struct net_device *netdev,
11196                        struct cfg80211_ft_event_params *ft_event)
11197 {
11198         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11199         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11200         struct sk_buff *msg;
11201         void *hdr;
11202
11203         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11204
11205         if (!ft_event->target_ap)
11206                 return;
11207
11208         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11209         if (!msg)
11210                 return;
11211
11212         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11213         if (!hdr) {
11214                 nlmsg_free(msg);
11215                 return;
11216         }
11217
11218         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
11219         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
11220         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
11221         if (ft_event->ies)
11222                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
11223         if (ft_event->ric_ies)
11224                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11225                         ft_event->ric_ies);
11226
11227         genlmsg_end(msg, hdr);
11228
11229         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11230                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
11231 }
11232 EXPORT_SYMBOL(cfg80211_ft_event);
11233
11234 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11235 {
11236         struct cfg80211_registered_device *rdev;
11237         struct sk_buff *msg;
11238         void *hdr;
11239         u32 nlportid;
11240
11241         rdev = wiphy_to_dev(wdev->wiphy);
11242         if (!rdev->crit_proto_nlportid)
11243                 return;
11244
11245         nlportid = rdev->crit_proto_nlportid;
11246         rdev->crit_proto_nlportid = 0;
11247
11248         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11249         if (!msg)
11250                 return;
11251
11252         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11253         if (!hdr)
11254                 goto nla_put_failure;
11255
11256         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11257             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11258                 goto nla_put_failure;
11259
11260         genlmsg_end(msg, hdr);
11261
11262         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11263         return;
11264
11265  nla_put_failure:
11266         if (hdr)
11267                 genlmsg_cancel(msg, hdr);
11268         nlmsg_free(msg);
11269
11270 }
11271 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11272
11273 /* initialisation/exit functions */
11274
11275 int nl80211_init(void)
11276 {
11277         int err;
11278
11279         err = genl_register_family_with_ops(&nl80211_fam,
11280                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
11281         if (err)
11282                 return err;
11283
11284         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
11285         if (err)
11286                 goto err_out;
11287
11288         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
11289         if (err)
11290                 goto err_out;
11291
11292         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
11293         if (err)
11294                 goto err_out;
11295
11296         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
11297         if (err)
11298                 goto err_out;
11299
11300 #ifdef CONFIG_NL80211_TESTMODE
11301         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
11302         if (err)
11303                 goto err_out;
11304 #endif
11305
11306         err = netlink_register_notifier(&nl80211_netlink_notifier);
11307         if (err)
11308                 goto err_out;
11309
11310         return 0;
11311  err_out:
11312         genl_unregister_family(&nl80211_fam);
11313         return err;
11314 }
11315
11316 void nl80211_exit(void)
11317 {
11318         netlink_unregister_notifier(&nl80211_netlink_notifier);
11319         genl_unregister_family(&nl80211_fam);
11320 }